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These are the user uploaded subtitles that are being translated: 1 00:00:34,243 --> 00:00:36,578 A Perfect Planet. 2 00:00:41,333 --> 00:00:44,211 Life flourishes on planet Earth... 3 00:00:52,469 --> 00:00:55,722 thanks to powerful natural forces. 4 00:01:02,271 --> 00:01:06,650 The weather gives us predictable patterns of rainfall. 5 00:01:09,653 --> 00:01:14,950 Sunlight delivers energy to all parts of planet Earth's surface. 6 00:01:17,744 --> 00:01:21,665 Ocean currents carry nutrients around the globe. 7 00:01:26,378 --> 00:01:30,716 Volcanoes create and fertilise the land. 8 00:01:32,718 --> 00:01:37,306 Together, these forces have helped shape our living planet. 9 00:01:41,518 --> 00:01:43,186 But it's a fragile system. 10 00:01:43,312 --> 00:01:45,105 All right, come on, let's get him in. 11 00:01:50,569 --> 00:01:55,365 This baby elephant is dying of thirst. 12 00:01:55,490 --> 00:01:56,867 Big swallow. 13 00:01:59,286 --> 00:02:02,456 The latest casualty of our changing world. 14 00:02:07,252 --> 00:02:12,299 Luckily, rescuers have found him, so he has a chance. 15 00:02:20,390 --> 00:02:24,311 This young animal is likely a victim of a new force... 16 00:02:26,146 --> 00:02:30,233 one so powerful it threatens the future of life on Earth. 17 00:02:48,669 --> 00:02:51,296 For over 6O years, I've been privileged 18 00:02:51,421 --> 00:02:55,467 to witness the natural world in all its wonder. 19 00:02:56,593 --> 00:03:02,224 But the planet I saw as a young man has changed beyond recognition. 20 00:03:03,975 --> 00:03:09,606 Human activity is now so dominant it's disrupting the forces of nature 21 00:03:09,731 --> 00:03:13,735 and the vital habitats that life needs to survive on Earth. 22 00:03:15,195 --> 00:03:18,490 This is the most important story of our time. 23 00:03:18,615 --> 00:03:22,619 So I've asked three world authorities from the front line 24 00:03:22,744 --> 00:03:24,913 to join me in telling it. 25 00:03:26,373 --> 00:03:30,335 Humans used to be a species just like any other on Earth. 26 00:03:30,460 --> 00:03:33,338 But we've now become so populous 27 00:03:33,463 --> 00:03:35,340 and so destructive 28 00:03:35,465 --> 00:03:38,260 that we are the single most influential creature on Earth. 29 00:03:39,428 --> 00:03:42,139 Everything around us is collapsing. 30 00:03:42,264 --> 00:03:45,142 This is the planet that we are handing over to future generations, 31 00:03:45,267 --> 00:03:48,478 and the worst part, I'll tell you the worst part, to me, 32 00:03:48,603 --> 00:03:51,064 is that they're going to turn around and be like, 33 00:03:51,189 --> 00:03:53,900 "Why did you not do something when you had the chance?" 34 00:03:54,025 --> 00:03:59,030 We are likely to lose over half the species of life on Earth 35 00:03:59,156 --> 00:04:01,783 over the next eight decades. 36 00:04:01,908 --> 00:04:05,746 The last time we had an extinction event of this magnitude 37 00:04:05,871 --> 00:04:07,664 was 65 million years ago. 38 00:04:08,790 --> 00:04:10,459 We are asleep. 39 00:04:10,584 --> 00:04:13,879 We are not taking a look at the enormity of this event. 40 00:04:15,839 --> 00:04:19,468 If you want evidence of how life is struggling to cope 41 00:04:19,593 --> 00:04:21,553 in our rapidly changing world... 42 00:04:23,221 --> 00:04:26,683 you need to look no further than here in Africa. 43 00:04:31,229 --> 00:04:36,735 As we warm the planet, we create more extreme droughts and floods, 44 00:04:36,860 --> 00:04:41,031 making it increasingly difficult for many animals to survive. 45 00:04:43,450 --> 00:04:48,622 One of our planet's most magnificent creatures is no exception. 46 00:04:56,546 --> 00:05:01,134 Adult elephants drink around 200 litres of water a day. 47 00:05:07,057 --> 00:05:11,269 When rains fail, as they did recently here in Kenya, 48 00:05:11,394 --> 00:05:14,314 watering holes quickly run dry... 49 00:05:15,607 --> 00:05:17,901 killing hundreds of them. 50 00:05:27,160 --> 00:05:29,663 You can see the scale of the problem... 51 00:05:31,581 --> 00:05:36,211 by the dozens of orphaned baby elephants left behind. 52 00:05:40,674 --> 00:05:43,677 These are the lucky survivors. 53 00:05:47,597 --> 00:05:50,559 They owe their lives to Angela Sheldrick 54 00:05:50,684 --> 00:05:52,060 and her team, 55 00:05:52,185 --> 00:05:54,145 who rescue these young orphans. 56 00:05:54,271 --> 00:05:56,815 Come on. Come on, little boy. 57 00:05:56,940 --> 00:06:01,403 "ANGELA". The orphans, when we find them, tend to be in a pretty sorry state. 58 00:06:08,827 --> 00:06:14,082 They are not only physically damaged but psychologically too. 59 00:06:14,207 --> 00:06:17,419 Hey. Hello. 60 00:06:17,544 --> 00:06:22,132 They have suffered such a loss, losing their elephant family, 61 00:06:22,257 --> 00:06:24,467 their mothers. 62 00:06:26,595 --> 00:06:31,516 Angela's team do their best to soothe that loss. 63 00:06:41,234 --> 00:06:43,278 Come on. 64 00:06:43,403 --> 00:06:46,781 "ANGELA". The keepers replace a lost elephant family. 65 00:07:01,087 --> 00:07:04,132 They provide the tender loving care and the nurturing 66 00:07:04,257 --> 00:07:07,010 that is so important for them to heal. 67 00:07:10,138 --> 00:07:13,099 The keepers are there 24/7. 68 00:07:19,773 --> 00:07:26,321 It is a very, very special relationship that actually does last a life time. 69 00:07:26,446 --> 00:07:28,323 Despite the elephants becoming wild, 70 00:07:28,448 --> 00:07:31,576 they do never forget that love and kindness. 71 00:07:36,957 --> 00:07:42,045 The orphans have to be bottle-fed eight times a day. 72 00:07:44,047 --> 00:07:46,299 "ANGELA". We raise these orphaned elephants to ultimately 73 00:07:46,424 --> 00:07:48,510 go back to their birthright... 74 00:07:49,970 --> 00:07:51,930 a wild and happy life. 75 00:07:52,055 --> 00:07:55,058 You're such a clown! 76 00:08:00,897 --> 00:08:04,526 Hey. 77 00:08:07,779 --> 00:08:10,156 Come with me. 78 00:08:13,493 --> 00:08:15,453 Go on. Go on. 79 00:08:15,578 --> 00:08:18,456 So far, Angela's organisation 80 00:08:18,581 --> 00:08:22,711 has released more than 150 orphaned elephants 81 00:08:22,836 --> 00:08:24,629 back into the wild. 82 00:08:24,754 --> 00:08:30,677 But to survive, they now need to live in managed reserves, 83 00:08:30,802 --> 00:08:34,931 where people top up water supplies when droughts return. 84 00:08:37,934 --> 00:08:42,480 "ANGELA". Over the years, we've seen an enormous change in the weather patterns. 85 00:08:44,149 --> 00:08:45,692 Greater unpredictability. 86 00:08:47,235 --> 00:08:50,071 The drier seasons are drier and longer. 87 00:08:50,196 --> 00:08:52,574 It is the 11th hour now. 88 00:08:52,699 --> 00:08:56,036 We have just one home, 89 00:08:56,161 --> 00:09:00,081 and we, as the dominant species, should take care of it... 90 00:09:01,249 --> 00:09:02,542 must take care of it. 91 00:09:02,667 --> 00:09:04,210 It is our responsibility. 92 00:09:07,839 --> 00:09:11,634 What! Need to say to people is, this is not going to get better. 93 00:09:11,760 --> 00:09:16,389 We are on a curve that's moving us with a series of events 94 00:09:16,514 --> 00:09:20,101 that's taking us into a new geological era in history. 95 00:09:24,481 --> 00:09:29,110 To understand how humans are destabilising our perfect planet, 96 00:09:29,235 --> 00:09:32,030 we need to look into the deep past. 97 00:09:34,324 --> 00:09:40,663 In Earth's long history, it's been through at least five mass extinction events. 98 00:09:42,707 --> 00:09:46,294 Most were caused by cataclysmic volcanic eruptions. 99 00:09:51,966 --> 00:09:55,762 It's not the lava or ash that wiped out life... 100 00:09:59,557 --> 00:10:03,937 but an invisible gas released by volcanoes 101 00:10:04,062 --> 00:10:05,772 called carbon dioxide... 102 00:10:07,023 --> 00:10:08,566 CO2. 103 00:10:10,735 --> 00:10:14,405 The single greatest extinction event on the planet so far was caused 104 00:10:14,531 --> 00:10:17,492 by the superheating of the world. 105 00:10:19,577 --> 00:10:23,915 Masses of volcanic activity pumped huge amounts of carbon into the atmosphere, 106 00:10:24,040 --> 00:10:26,376 massively raised the global temperature, 107 00:10:26,501 --> 00:10:31,673 and saw the destruction of around 90% of all life on Earth. 108 00:10:33,049 --> 00:10:36,845 Humanity is now acting like a super-volcano. 109 00:10:38,638 --> 00:10:42,892 We're releasing carbon dioxide at an even greater rate 110 00:10:43,017 --> 00:10:48,648 than the prehistoric mega-eruptions that extinguished life in the past. 111 00:10:56,865 --> 00:10:58,283 Here 3 the problem. 112 00:10:58,408 --> 00:11:01,077 Over the last two centuries, 113 00:11:01,202 --> 00:11:05,498 we dug up the burial grounds of our previous geological era in history... 114 00:11:07,125 --> 00:11:08,668 the Carboniferous era. 115 00:11:08,793 --> 00:11:12,463 And we took those dead remains, in the form of oil, 116 00:11:12,589 --> 00:11:15,383 gas and coal, and we made 117 00:11:15,508 --> 00:11:19,679 the entire industrial civilisation based on these fossil fuels. 118 00:11:25,852 --> 00:11:31,608 Almost every part of modern life depends on energy generated 119 00:11:31,733 --> 00:11:34,068 by burning these fossil fuels. 120 00:11:35,904 --> 00:11:39,199 And that produces CO2 in huge amounts. 121 00:11:42,577 --> 00:11:48,499 Globally, we now release 100 times more carbon dioxide into the atmosphere 122 00:11:48,625 --> 00:11:51,711 than all Earth's volcanoes combined. 123 00:11:52,795 --> 00:11:56,299 Ana' by burning more fossil fuels, releasing more carbon dioxide, 124 00:11:56,424 --> 00:11:58,218 heating up the world around us, 125 00:11:58,343 --> 00:12:03,640 we have become one of the most powerful, destructive forces on the planet. 126 00:12:04,766 --> 00:12:08,603 Carbon dioxide acts like a blanket, 127 00:12:08,728 --> 00:12:10,897 trapping the sun's heat. 128 00:12:11,022 --> 00:12:13,316 This raises the temperature 129 00:12:13,441 --> 00:12:18,238 and so destabilises one of the most important forces on Earth - 130 00:12:18,363 --> 00:12:20,031 the weather. 131 00:12:25,495 --> 00:12:30,708 Many animals rely on predictable patterns of rainfall. 132 00:12:35,838 --> 00:12:41,052 But as our world warms, our weather is changing. 133 00:12:44,472 --> 00:12:47,600 For every one degree that the temperature 134 00:12:47,725 --> 00:12:51,020 goes up on this planet, because of CO2 emissions... 135 00:12:54,732 --> 00:12:58,152 the atmosphere is sucking up 7% more water. 136 00:13:00,989 --> 00:13:04,242 So we're getting more concentrated precipitation in the clouds... 137 00:13:06,411 --> 00:13:07,620 and more radical, 138 00:13:07,745 --> 00:13:11,457 extreme, unpredictable, out-of-control weather events. 139 00:13:15,503 --> 00:13:18,798 Millions are bracing for a hurricane the likes of which we've never seen. 140 00:13:18,923 --> 00:13:20,174 We are getting hurricanes 141 00:13:20,300 --> 00:13:24,804 that are devastating our ecosystems and killing human beings every year. 142 00:13:27,765 --> 00:13:31,311 They're now over and over and over again every season. 143 00:13:34,063 --> 00:13:36,983 This planet is more powerful 144 00:13:37,108 --> 00:13:38,151 than we thought. 145 00:13:42,655 --> 00:13:44,490 More fires, more droughts, more floods. 146 00:13:46,326 --> 00:13:49,120 And so this perfect planet of ours is now 147 00:13:49,245 --> 00:13:51,164 being thrown into a system of flux. 148 00:14:01,257 --> 00:14:04,218 These extreme conditions are making it 149 00:14:04,344 --> 00:14:06,763 increasingly difficult for animals to survive. 150 00:14:13,394 --> 00:14:16,898 And that is not just affecting wildlife. 151 00:14:21,277 --> 00:14:26,908 New research suggests that for every one degree rise in global temperatures, 152 00:14:27,033 --> 00:14:32,246 a billion people will be pushed into near unliveable extremes. 153 00:14:33,623 --> 00:14:39,212 And this could trigger one of the greatest human migrations in history. 154 00:14:41,881 --> 00:14:43,716 We 're about to have climate refugees, 155 00:14:43,841 --> 00:14:47,095 forced out of uninhabitable areas of the world, 156 00:14:47,220 --> 00:14:48,513 pushed up into Europe. 157 00:14:53,017 --> 00:14:54,268 We are on the cusp 158 00:14:54,394 --> 00:14:58,106 of the biggest migratory pattern 159 00:14:58,231 --> 00:14:59,399 in human history. 160 00:15:01,150 --> 00:15:03,945 We're going to see millions, tens of millions 161 00:15:04,070 --> 00:15:06,572 and, unfortunately, hundreds of millions of people 162 00:15:06,697 --> 00:15:09,867 migrating from areas that are no longer liveable 163 00:15:09,992 --> 00:15:13,663 in the next 20, 30, 40, 50 and 60 years. 164 00:15:15,665 --> 00:15:17,333 Ana' people are frightened - 165 00:15:17,458 --> 00:15:20,711 because this is outside of our frame of reference. 166 00:15:26,426 --> 00:15:28,136 But there is hope. 167 00:15:30,930 --> 00:15:35,309 In Africa, the Sahara Desert is advancing southwards. 168 00:15:35,435 --> 00:15:41,524 But a remarkable project is aiming to stop it in its tracks. 169 00:15:48,197 --> 00:15:50,283 The ambitious goal 170 00:15:50,408 --> 00:15:54,787 is to plant over one billion drought-resistant trees, 171 00:15:54,912 --> 00:15:56,747 like acacias. 172 00:15:56,873 --> 00:15:59,250 Known as the Great Green Wall, 173 00:15:59,375 --> 00:16:04,255 once complete, a band of trees will stretch nearly 5,000 miles 174 00:16:04,380 --> 00:16:06,591 right across Africa... 175 00:16:08,342 --> 00:16:11,471 one of the largest living structures on the planet. 176 00:16:13,931 --> 00:16:17,018 These trees stop topsoil blowing away, 177 00:16:17,143 --> 00:16:19,854 and their roots penetrate the ground, 178 00:16:19,979 --> 00:16:22,315 creating a network of channels 179 00:16:22,440 --> 00:16:26,068 that store water whenever rain falls. 180 00:16:29,822 --> 00:16:34,118 Ten-year-old Korka is one of the first children to benefit. 181 00:16:47,089 --> 00:16:51,761 12 million trees have already been planted here in Senegal, 182 00:16:51,886 --> 00:16:54,263 and with dramatic results. 183 00:16:57,934 --> 00:17:01,938 Wells are filling again, allowing crops to grow. 184 00:17:31,133 --> 00:17:35,513 So far, only 15% of the Green Wall is complete, 185 00:17:35,638 --> 00:17:39,058 but it's already breathing life back into the land, 186 00:17:39,183 --> 00:17:41,102 stemming the exodus of people 187 00:17:41,227 --> 00:17:44,063 and keeping communities together. 188 00:17:49,277 --> 00:17:52,530 And the trees do something else for our children's future. 189 00:17:56,826 --> 00:17:58,286 As they grow, 190 00:17:58,411 --> 00:18:02,456 they remove carbon dioxide from the air. 191 00:18:06,961 --> 00:18:11,215 Carbon is the very foundation of life. 192 00:18:12,967 --> 00:18:16,387 Every plant absorbs it from the air... 193 00:18:17,972 --> 00:18:19,849 using it to grow. 194 00:18:22,476 --> 00:18:24,228 When animals eat these plants, 195 00:18:24,353 --> 00:18:29,525 some of this carbon is locked away in the fabric of their bodies. 196 00:18:33,446 --> 00:18:36,240 Together, these wild places, 197 00:18:36,365 --> 00:18:39,660 and the animals that allow them to thrive, 198 00:18:39,785 --> 00:18:44,540 take up over a third of the carbon dioxide we release. 199 00:18:46,334 --> 00:18:48,586 "ASHA". All of these systems, and the life within it, 200 00:18:48,711 --> 00:18:52,965 are so important to protect us 201 00:18:53,090 --> 00:18:55,092 from a warming planet. 202 00:19:00,056 --> 00:19:04,060 Some of the Earth's most important carbon stores 203 00:19:04,185 --> 00:19:07,688 are those rich in plant and animal species - 204 00:19:07,813 --> 00:19:10,358 the tropical jungles. 205 00:19:12,985 --> 00:19:14,528 "NXALL". Forests are sponges. 206 00:19:14,654 --> 00:19:17,448 They absorb enormous amounts of CO2 207 00:19:17,573 --> 00:19:19,909 from the atmosphere, and they trap that inside. 208 00:19:23,371 --> 00:19:26,499 Forests are about much more than just trees. 209 00:19:26,624 --> 00:19:30,795 In order to thrive, a jungle needs bustling animal communities. 210 00:19:32,129 --> 00:19:34,340 It needs insects to pollinate. 211 00:19:34,465 --> 00:19:36,759 It needs mammals to spread the seeds 212 00:19:36,884 --> 00:19:38,594 from one part of the forest to another. 213 00:19:38,719 --> 00:19:42,890 It needs this massive tangled web of species interactions. 214 00:19:44,183 --> 00:19:45,476 A jungle rich in animals 215 00:19:45,601 --> 00:19:49,021 stores so much more carbon than a forest with little life. 216 00:19:54,694 --> 00:19:58,406 But many of the world's tropical jungles are under threat. 217 00:19:59,657 --> 00:20:05,121 And none more so than the greatest of them all, the Amazon rainforest. 218 00:20:09,500 --> 00:20:13,587 It's essential for the health of our planet, storing as much carbon 219 00:20:13,713 --> 00:20:19,593 as 25 years' worth of current emissions from all the cars in the world. 220 00:20:21,178 --> 00:20:25,141 The Amazon rainforest is one of the keystones of our climate. 221 00:20:25,266 --> 00:20:29,103 If we lose enough of the Amazon that it stops to function like that, 222 00:20:29,228 --> 00:20:33,566 then it's going to be an absolute disaster for civilisation, it really will. 223 00:20:38,404 --> 00:20:41,824 But urban expansion, cattle ranching 224 00:20:41,949 --> 00:20:45,911 and mining means that the forests of the Amazon 225 00:20:46,036 --> 00:20:49,248 are being lost at a frightening rate. 226 00:20:54,670 --> 00:20:58,090 "NXALL". It's not beyond the realms of possibility that we could 227 00:20:58,215 --> 00:21:02,762 deforest a rainforest, like the Amazon, so that trees cannot grow there 228 00:21:02,887 --> 00:21:04,722 and it turns into a savanna. 229 00:21:10,686 --> 00:21:15,107 Every minute, an area the size of about two football pitches 230 00:21:15,232 --> 00:21:17,401 is destroyed by humans. 231 00:21:17,526 --> 00:21:21,238 These amazing ecosystems around us - the oceans, the jungles, the forests, 232 00:21:21,363 --> 00:21:24,241 the mangroves - these are our greatest hope 233 00:21:24,366 --> 00:21:27,912 and our greatest buffers against a warming planet. 234 00:21:32,291 --> 00:21:35,252 On the front line in the heart of the Amazon 235 00:21:35,377 --> 00:21:37,797 stands of the city of Manaus. 236 00:21:39,965 --> 00:21:43,511 Here, urban expansion is eating into the jungle. 237 00:21:58,651 --> 00:22:02,571 Celina Pinagé works for IPAAM, 238 00:22:02,696 --> 00:22:05,991 the Amazonas Environmental Protection Unit. 239 00:22:07,284 --> 00:22:10,371 Their mission is to save animals trapped in the city 240 00:22:10,496 --> 00:22:12,498 and to return them to the wild. 241 00:22:38,816 --> 00:22:42,403 Today, Celina is rescuing a sloth. 242 00:22:42,528 --> 00:22:45,489 It's the world's slowest mammal. 243 00:22:45,614 --> 00:22:49,201 Many become trapped as trees are cut down 244 00:22:49,326 --> 00:22:50,953 to make way for houses. 245 00:23:24,695 --> 00:23:29,617 Over 3,000 animals have been rescued in the past five years. 246 00:23:32,661 --> 00:23:37,082 Each one of these creatures is needed by the forest - 247 00:23:37,207 --> 00:23:40,586 to disperse seeds, pollinate plants 248 00:23:40,711 --> 00:23:44,798 or, like this jaguar, to keep herbivores in check. 249 00:23:55,225 --> 00:24:01,565 Whenever possible, Celina releases animals back into the protected areas of jungle. 250 00:24:30,636 --> 00:24:33,681 We don't just want to protect animals because they are interesting 251 00:24:33,806 --> 00:24:35,099 and they're beautiful. 252 00:24:35,224 --> 00:24:39,645 They're an integral part of a functioning planet, and we need to keep them around. 253 00:24:43,482 --> 00:24:47,820 So, how do we protect our remaining forests? 254 00:24:47,945 --> 00:24:52,533 Calculating their true environmental value could hold the key. 255 00:24:54,660 --> 00:24:59,248 And a new cutting-edge technology is beginning to do just that. 256 00:25:01,375 --> 00:25:06,672 It's led by a team from the Global Airborne Observatory. 257 00:25:06,797 --> 00:25:13,095 They've developed a way to quantify exactly how much carbon the forest stores. 258 00:25:16,974 --> 00:25:20,561 By firing high-powered lasers across the canopy, 259 00:25:20,686 --> 00:25:24,565 they can map the amount of carbon within each tree. 260 00:25:30,612 --> 00:25:35,534 The trees showing up as red and yellow are the most carbon rich. 261 00:25:38,662 --> 00:25:44,501 These maps allow countries to see how valuable their forests are. 262 00:25:48,422 --> 00:25:51,258 I truly hope that we aren't too far away 263 00:25:51,383 --> 00:25:55,387 from realising the intrinsic value of wildlife, of forests, 264 00:25:55,512 --> 00:25:58,557 but we're not there yet, and for the time being 265 00:25:58,682 --> 00:26:02,603 governments need to be financially incentivised to keep forests standing 266 00:26:02,728 --> 00:26:04,438 and to not cut them down. 267 00:26:09,068 --> 00:26:13,614 But what about areas of forest that have already been destroyed? 268 00:26:15,824 --> 00:26:19,995 In the Amazon, a revolutionary project is under way. 269 00:26:23,749 --> 00:26:26,627 The aim is to plant a new jungle 270 00:26:26,752 --> 00:26:30,297 of 73 million trees. 271 00:26:35,302 --> 00:26:40,599 But regrowing a species-rich forest has always proved difficult. 272 00:26:44,353 --> 00:26:49,775 So the project has turned to the indigenous peoples of the Amazon, 273 00:26:49,900 --> 00:26:52,945 and young women like Milene Alves. 274 00:27:12,923 --> 00:27:16,927 Milene's community has a unique knowledge of seeds. 275 00:27:22,558 --> 00:27:27,229 It's enabled them to collect over 200 of the most important tree species 276 00:27:27,354 --> 00:27:29,273 from across the Amazon. 277 00:28:03,974 --> 00:28:06,268 By mixing the seeds together, 278 00:28:06,393 --> 00:28:10,814 it allows them to create a super-recipe known as a muvuca. 279 00:28:13,609 --> 00:28:19,698 In this mixture, there is enough tree variety to jump-start a new jungle. 280 00:28:22,576 --> 00:28:25,329 Every year, around 20 tonnes of seeds 281 00:28:25,454 --> 00:28:29,166 are scattered over acres of burnt and degraded land. 282 00:28:31,251 --> 00:28:32,669 After six yea rs, 283 00:28:32,794 --> 00:28:35,297 they will have restored an area of forest 284 00:28:35,422 --> 00:28:39,092 the size of 30,000 football fields... 285 00:28:40,302 --> 00:28:44,723 the largest tropical restoration project in the world. 286 00:28:50,187 --> 00:28:52,022 "NXALL". The best thing we can possibly do 287 00:28:52,147 --> 00:28:55,525 to mitigate the effects of a warming planet is to plant more trees 288 00:28:55,651 --> 00:28:57,861 and protect those trees that we have. 289 00:28:57,986 --> 00:28:59,112 We can do this. 290 00:28:59,238 --> 00:29:02,032 If we put them back, we are creating 291 00:29:02,157 --> 00:29:04,534 that stable climate that we need to survive, 292 00:29:04,660 --> 00:29:06,119 and it's such an easy thing to do. 293 00:29:06,245 --> 00:29:11,333 Planting trees and saving wildlife is a vital solution on land, 294 00:29:11,458 --> 00:29:13,961 but it's only part of the story. 295 00:29:14,086 --> 00:29:16,255 The carbon dioxide we produce 296 00:29:16,380 --> 00:29:19,091 is damaging another crucial part of our planet- 297 00:29:19,216 --> 00:29:20,717 the oceans. 298 00:29:26,390 --> 00:29:30,519 Life cannot survive without them. 299 00:29:35,983 --> 00:29:38,318 The reason we can walk out and live 300 00:29:38,443 --> 00:29:40,737 and breathe oxygen is because 301 00:29:40,862 --> 00:29:42,572 it's generated in the oceans. 302 00:29:46,243 --> 00:29:51,206 The oceans produce up to 70% of the oxygen we breathe 303 00:29:51,331 --> 00:29:54,876 and feed over three billion people. 304 00:29:59,673 --> 00:30:01,591 Just like our forests, 305 00:30:01,717 --> 00:30:06,972 the plants and animals here absorb vast amounts of carbon from the atmosphere. 306 00:30:09,516 --> 00:30:12,644 And when they die, it sinks down to the ocean floor. 307 00:30:16,315 --> 00:30:19,067 The ocean is what we call a carbon sink. 308 00:30:19,192 --> 00:30:21,403 Basically, it's a giant sponge 309 00:30:21,528 --> 00:30:27,534 that has forever been absorbing all the excess carbon from the atmosphere, 310 00:30:27,659 --> 00:30:30,078 taking it down to the depths and keeping it there. 311 00:30:31,413 --> 00:30:35,334 The most vital life forms that allow the ocean to do this 312 00:30:35,459 --> 00:30:37,377 are some of the tiniest, 313 00:30:37,502 --> 00:30:41,673 microscopic plant-like organisms - 314 00:30:41,798 --> 00:30:44,051 phytoplankton. 315 00:30:44,176 --> 00:30:47,387 Now, we don't pay much attention to the little teeny plankton. 316 00:30:47,512 --> 00:30:53,310 But plankton are the most important organisms for taking carbon dioxide 317 00:30:53,435 --> 00:30:56,021 and transforming it into oxygen for the planet. 318 00:30:57,564 --> 00:31:00,233 Phytoplankton are the base of the food chain 319 00:31:00,359 --> 00:31:02,361 on top of which everything else survives. 320 00:31:02,486 --> 00:31:04,363 The krill eats the phytoplankton, 321 00:31:04,488 --> 00:31:06,740 whales eat the krill, 322 00:31:06,865 --> 00:31:09,701 sharks eat the fish, and so on and so forth. 323 00:31:09,826 --> 00:31:13,747 We need phytoplankton for everything else in the oceans to survive, 324 00:31:13,872 --> 00:31:17,334 to trap that carbon and keep our climate cool. 325 00:31:18,627 --> 00:31:23,382 But some of these crucial phytoplankton are under attack. 326 00:31:28,887 --> 00:31:31,598 Since the start of the Industrial Revolution, 327 00:31:31,723 --> 00:31:37,020 the oceans have absorbed almost half of all our CO2 emissions. 328 00:31:38,271 --> 00:31:40,982 But that has come at a cost. 329 00:31:46,446 --> 00:31:51,535 When water absorbs carbon dioxide, it becomes more acidic. 330 00:31:54,371 --> 00:31:57,999 But the problem when you have this acidification 331 00:31:58,125 --> 00:32:00,836 is that shells are made of calcium carbonate, 332 00:32:00,961 --> 00:32:03,672 and as you have this increased acidity in the oceans, 333 00:32:03,797 --> 00:32:05,757 it starts to dissolve these structures. 334 00:32:05,882 --> 00:32:10,053 That threatens anything with a shell. 335 00:32:10,178 --> 00:32:13,557 Our increasingly warm, acidic waters 336 00:32:13,682 --> 00:32:16,810 are not only destroying coral reefs 337 00:32:16,935 --> 00:32:19,813 but decimating some phytoplankton, 338 00:32:19,938 --> 00:32:24,234 the amount of which has fallen by as much as 40% in recent years. 339 00:32:26,445 --> 00:32:33,034 250 million years ago, the ocean also warmed and became more acidic, 340 00:32:33,160 --> 00:32:39,291 contributing to the mass extinction of around 96% of all marine life. 341 00:32:40,709 --> 00:32:44,004 "ASHA". If we have less phytoplankton, the base of every food web, 342 00:32:44,129 --> 00:32:46,673 you lose so much more of everything else. 343 00:32:49,092 --> 00:32:52,762 It is serious. If we have less phytoplankton, 344 00:32:52,888 --> 00:32:58,143 we have less oxygen, which is what we need to survive. 345 00:33:01,980 --> 00:33:03,899 And the oceans are being damaged 346 00:33:04,024 --> 00:33:06,568 in another way. 347 00:33:06,693 --> 00:33:09,654 Research suggests that overfishing 348 00:33:09,779 --> 00:33:14,951 has removed as much as 90% of all large predatory fish. 349 00:33:15,076 --> 00:33:19,789 And fewer fish means a marine system that stores 350 00:33:19,915 --> 00:33:20,957 less carbon. 351 00:33:22,000 --> 00:33:26,296 Ocean species are dying at a rate that's so fast 352 00:33:26,421 --> 00:33:29,549 that if it were human beings we would absolutely be terrified. 353 00:33:35,639 --> 00:33:37,098 But there is hope here, too. 354 00:33:41,228 --> 00:33:43,438 When areas of ocean are protected, 355 00:33:43,563 --> 00:33:46,525 marine life can recover. 356 00:33:50,403 --> 00:33:52,280 Here, off the coast of Gabon, 357 00:33:52,405 --> 00:33:55,534 they've created one of Earth's most ambitious networks 358 00:33:55,659 --> 00:33:57,994 of marine protected areas. 359 00:34:01,748 --> 00:34:05,043 It's a hot spot for breeding whales and dolphins... 360 00:34:08,755 --> 00:34:11,716 and one of the most important of all marine predators... 361 00:34:13,969 --> 00:34:15,679 sharks. 362 00:34:16,888 --> 00:34:21,935 Sharks prevent the species they feed on from becoming overabundant, 363 00:34:22,060 --> 00:34:26,398 an essential factor in maintaining our oceans' rich diversity. 364 00:34:28,066 --> 00:34:31,069 When people think about poaching in Africa, 365 00:34:31,194 --> 00:34:34,531 they think about elephants and rhinos and hippos 366 00:34:34,656 --> 00:34:37,409 and these great, majestic creatures on land. 367 00:34:37,534 --> 00:34:41,288 But there is poaching that's taking place at sea. 368 00:34:42,372 --> 00:34:47,377 The reason that I call these fishermen poachers is that they are taking wildlife 369 00:34:47,502 --> 00:34:49,754 without licence. 370 00:34:49,879 --> 00:34:52,591 Captain Peter Hammarstedt, who works for the conservation group. 371 00:34:52,716 --> 00:34:54,593 Sea Shepherd, 372 00:34:54,718 --> 00:34:59,055 is patrolling the 20,000-square-mile marine park. 373 00:35:00,390 --> 00:35:03,977 Prepare boats for launch, prepare boats for launch. Thank you. 374 00:35:04,102 --> 00:35:08,857 They've spotted a commercial fishing boat on the edge of the park 375 00:35:08,982 --> 00:35:11,359 which needs investigating. 376 00:35:13,653 --> 00:35:16,656 The Gabonese government has joined forces with Peter's team 377 00:35:16,781 --> 00:35:18,658 to carry out boat inspections. 378 00:35:21,244 --> 00:35:25,790 The vessel may have a licence to fish here, 379 00:35:25,915 --> 00:35:28,251 but it could be taking more than its quota 380 00:35:28,376 --> 00:35:30,545 and catching protected species, 381 00:35:30,670 --> 00:35:33,173 like dolphins and sharks. 382 00:35:41,348 --> 00:35:43,475 When fighting a war to stop illegal fishing, 383 00:35:43,600 --> 00:35:46,978 the odds can seem insurmountable. 384 00:36:11,419 --> 00:36:14,130 This boat's fishing nets have pulled up 385 00:36:14,255 --> 00:36:16,257 threatened silky and blue sharks. 386 00:36:19,636 --> 00:36:23,973 Catching and keeping these creatures is illegal, 387 00:36:24,099 --> 00:36:27,811 so the fishermen must throw them back. 388 00:36:27,936 --> 00:36:32,816 But many are already so badly injured they will not survive the ordeal. 389 00:36:34,442 --> 00:36:38,071 It saddens me greatly to see these incredible creatures 390 00:36:38,196 --> 00:36:43,034 being brutally manhandled as they're dragged across the deck, 391 00:36:43,159 --> 00:36:46,329 their fingers in their gills as they pull them. 392 00:36:51,459 --> 00:36:55,088 Globally each year, millions of sharks 393 00:36:55,213 --> 00:37:01,010 and over 300,000 whales and dolphins are accidentally killed by fishing nets, 394 00:37:01,136 --> 00:37:04,347 seriously injuring the health of the oceans. 395 00:37:04,472 --> 00:37:09,269 Its the efficiency of these vessels that shocks me to the core... 396 00:37:10,437 --> 00:37:13,064 this sheer killing power of them. 397 00:37:14,733 --> 00:37:16,693 And you can really see 398 00:37:16,818 --> 00:37:20,363 why the oceans are being sucked dry of life. 399 00:37:36,171 --> 00:37:38,631 But the patrols are working. 400 00:37:38,757 --> 00:37:43,219 In the past three years, they have arrested 50 vessels 401 00:37:43,344 --> 00:37:45,555 and inspected hundreds more. 402 00:37:46,681 --> 00:37:48,975 "PETER". Last year, we assisted the coastguard 403 00:37:49,100 --> 00:37:52,061 to arrest a vessel that was poaching sharks. 404 00:37:52,187 --> 00:37:54,647 And by arresting this one single ship, 405 00:37:54,773 --> 00:37:58,943 we were able to save the lives of 250,000 sharks. 406 00:38:02,113 --> 00:38:06,159 Marine life here now has a chance. 407 00:38:08,119 --> 00:38:12,081 Currently, around 5% of the oceans are protected, 408 00:38:12,207 --> 00:38:16,795 but there's a global campaign to raise that to 30%. 409 00:38:18,087 --> 00:38:22,634 If we can do that, many of the planet's most vulnerable species 410 00:38:22,759 --> 00:38:24,803 could recover. 411 00:38:24,928 --> 00:38:30,225 And a healthier ocean has the power to absorb more CO2. 412 00:38:33,061 --> 00:38:34,687 We thought the ocean is 413 00:38:34,813 --> 00:38:40,026 this infinite space that is full of infinite resources... 414 00:38:41,152 --> 00:38:44,364 and this infinite capacity to 415 00:38:44,489 --> 00:38:48,201 withstand and tolerate everything that we throw at it. 416 00:38:49,911 --> 00:38:51,663 And I think we do need to... 417 00:38:51,788 --> 00:38:57,085 stop and reconsider our strategies if we want to move forward. 418 00:39:02,465 --> 00:39:06,511 Humans aren't just damaging life in the sea. 419 00:39:06,636 --> 00:39:11,307 We're also disturbing one of its most important forces... 420 00:39:15,728 --> 00:39:17,856 ocean currents. 421 00:39:22,318 --> 00:39:28,700 These transport essential nutrients to almost all marine creatures. 422 00:39:28,825 --> 00:39:30,326 We're dependent on 423 00:39:30,451 --> 00:39:33,204 these large circulation patterns that go on in our oceans. 424 00:39:34,789 --> 00:39:36,749 There's this continuous movement 425 00:39:36,875 --> 00:39:39,085 of beautiful cold water coming from the depths. 426 00:39:40,628 --> 00:39:41,796 It's chock-full of nutrients, 427 00:39:41,921 --> 00:39:43,201 it's chock-full of productivity. 428 00:39:44,883 --> 00:39:48,303 These currents begin at the poles. 429 00:39:50,430 --> 00:39:51,681 Here, cold, salty water, 430 00:39:51,806 --> 00:39:54,851 which is more dense, sinks to the depths... 431 00:39:56,853 --> 00:39:59,105 and flows towards the tropics 432 00:39:59,230 --> 00:40:00,690 and beyond. 433 00:40:03,860 --> 00:40:08,489 In the hotter parts of the Earth, warmer water rises and flows 434 00:40:08,615 --> 00:40:10,450 back towards the poles. 435 00:40:11,576 --> 00:40:14,537 This creates a global conveyor belt 436 00:40:14,662 --> 00:40:18,833 that circulates nutrients, oxygen and heat around our planet, 437 00:40:18,958 --> 00:40:22,295 regulating Earth's climate and weather. 438 00:40:23,588 --> 00:40:29,302 But it's now feared that our warming planet is destabilising the system. 439 00:40:31,346 --> 00:40:34,182 As you have an increase in ocean temperatures, 440 00:40:34,307 --> 00:40:36,017 it has impacts on everything. 441 00:40:36,142 --> 00:40:38,436 We have glaciers across the world, and as they melt, 442 00:40:38,561 --> 00:40:41,981 you have more of this fresh water just pushing into the oceans. 443 00:40:42,106 --> 00:40:46,235 And this fresh water is less saline, it's less salty, 444 00:40:46,361 --> 00:40:49,572 and that tends to float at the surface. 445 00:40:50,865 --> 00:40:54,285 And it's not moving. You don't have this circulation. 446 00:40:54,410 --> 00:40:56,496 It's causing a breakdown. 447 00:40:57,872 --> 00:41:01,709 Many animals depend on reliable ocean currents, 448 00:41:01,834 --> 00:41:03,670 so, as they change, 449 00:41:03,795 --> 00:41:06,631 the effect can be disastrous. 450 00:41:08,800 --> 00:41:10,176 This can be witnessed 451 00:41:10,301 --> 00:41:13,554 off the north-east coast of the United States, 452 00:41:13,680 --> 00:41:15,390 where it's thought to be triggering 453 00:41:15,515 --> 00:41:19,435 mass casualties of a critically endangered species. 454 00:41:20,937 --> 00:41:24,607 The fact that they're even here just stuns so many people. 455 00:41:24,732 --> 00:41:29,028 Bob Prescott heads up the emergency response team. 456 00:41:35,034 --> 00:41:38,371 We have about 250 people that walk beaches. 457 00:41:38,496 --> 00:41:40,790 They're looking for turtles in trouble. 458 00:41:42,834 --> 00:41:44,269 "NEWS". This week's frigid conditions 459 00:41:44,293 --> 00:41:46,713 have stunned sea turtles and left them 460 00:41:46,838 --> 00:41:49,007 stranded on beaches throughout the north-east. 461 00:41:49,132 --> 00:41:52,677 If you spot one, move the turtle above the high-tide line 462 00:41:52,802 --> 00:41:55,847 until a trained responder arrives. 463 00:41:55,972 --> 00:41:57,348 Timing is everything. 464 00:41:57,473 --> 00:41:59,809 If we can get to them within an hour 465 00:41:59,934 --> 00:42:01,853 of them washing up onto the beach, 466 00:42:01,978 --> 00:42:04,063 then we're going to be able to save 467 00:42:04,188 --> 00:42:06,691 90 to 95% of them. 468 00:42:07,859 --> 00:42:10,361 Here, off the coast of Boston, 469 00:42:10,486 --> 00:42:13,948 waters are warming faster than almost anywhere on Earth. 470 00:42:15,241 --> 00:42:18,578 It's thought to be causing turtles from the tropics to swim 471 00:42:18,703 --> 00:42:22,206 further north than ever before for summer feeding. 472 00:42:24,083 --> 00:42:26,586 But when the cold autumn waters suddenly close in, 473 00:42:26,711 --> 00:42:29,380 the turtles go into shock. 474 00:42:31,758 --> 00:42:34,093 These are very young turtles. 475 00:42:34,218 --> 00:42:35,928 They're anywhere from one and a half 476 00:42:36,054 --> 00:42:37,221 to six years old. 477 00:42:38,556 --> 00:42:41,059 When we find them, they're hypothermia, 478 00:42:41,184 --> 00:42:44,771 their heart is beating at one to five beats a minute. 479 00:42:44,896 --> 00:42:47,231 The blood is barely circulating. 480 00:42:47,356 --> 00:42:50,151 For all intents and purposes, look dead. 481 00:42:50,276 --> 00:42:51,736 The critically ill animals 482 00:42:51,861 --> 00:42:55,198 are rushed to the New England Aquarium, near Boston. 483 00:42:55,323 --> 00:43:00,536 It has a state-of-the-art ER unit for turtles. 484 00:43:02,163 --> 00:43:04,248 We don't want to stress them any further, 485 00:43:04,373 --> 00:43:06,793 so we now treat the whole episode 486 00:43:06,918 --> 00:43:09,003 as sort of entering an ICU unit of a hospital. 487 00:43:10,505 --> 00:43:13,382 This is critical care for some turtles. 488 00:43:13,508 --> 00:43:17,386 He's pretty stiff, so I can't get his mouth open any more. 489 00:43:17,512 --> 00:43:19,263 See, it's right there. 490 00:43:19,388 --> 00:43:21,099 Oh, there we are, there we are. 491 00:43:22,642 --> 00:43:27,021 When a turtle arrives, its condition is rapidly assessed. 492 00:43:27,146 --> 00:43:29,273 - How you doing? - The animals are given 493 00:43:29,398 --> 00:43:31,734 stabilising drugs and fluids. 494 00:43:31,859 --> 00:43:34,237 Their lungs are cleared of water 495 00:43:34,362 --> 00:43:36,781 and sand washed out of their scratched eyes. 496 00:43:39,951 --> 00:43:41,953 Got emergency meds. 497 00:43:42,078 --> 00:43:43,621 The veterinary team 498 00:43:43,746 --> 00:43:45,164 must ventilate turtles 499 00:43:45,289 --> 00:43:47,208 that are close to death 500 00:43:47,333 --> 00:43:49,252 - to help them breathe. - No response at all. 501 00:43:49,377 --> 00:43:54,632 But it's worth it for an animal that might live another 50 years. 502 00:43:56,592 --> 00:43:58,594 "BOB". You want to save as many as you can. 503 00:43:59,637 --> 00:44:01,055 And it is depressing at times, 504 00:44:01,180 --> 00:44:03,224 cos a lot of them don't make it. 505 00:44:07,937 --> 00:44:11,941 You know, last year at Thanksgiving, we had 200 dead turtles. 506 00:44:14,819 --> 00:44:19,198 Right, and you're looking into its eyes, it's looking back at you. 507 00:44:19,323 --> 00:44:20,950 There is a connection there. 508 00:44:22,326 --> 00:44:25,872 And it gets stronger and stronger as they start to recover. 509 00:44:28,374 --> 00:44:31,919 It can take months for the turtles to recuperate. 510 00:44:32,044 --> 00:44:33,337 But once they do, 511 00:44:33,462 --> 00:44:37,175 they'll make the first plane flight of their lives. 512 00:44:37,300 --> 00:44:39,969 We have a big transport this morning, 513 00:44:40,094 --> 00:44:42,263 44 ridleys and one loggerhead. 514 00:44:42,388 --> 00:44:44,473 So we're going to start in 15B. 515 00:44:44,599 --> 00:44:47,310 All right, let's get to work! 516 00:44:48,769 --> 00:44:50,229 "BOB". They are part of the planet. 517 00:44:51,397 --> 00:44:55,860 They're part of our very delicate web of life, if you will. 518 00:44:55,985 --> 00:44:59,155 38, 41, 44... 519 00:44:59,280 --> 00:45:03,826 The bottom line for all these turtles is to get them back out into the water. 520 00:45:06,621 --> 00:45:10,124 We're doing great on timing, everybody. 521 00:45:13,377 --> 00:45:16,380 A very exciting day, cos it just brings that turtle 522 00:45:16,505 --> 00:45:19,759 one step closer to being released back into the wild. 523 00:45:21,427 --> 00:45:24,597 These mass casualties of our changing oceans 524 00:45:24,722 --> 00:45:28,768 are to be flown south, to Florida and beyond. 525 00:45:28,893 --> 00:45:33,314 The future of this species depends on these young turtles... 526 00:45:33,439 --> 00:45:34,815 - Ready. - All right! 527 00:45:34,941 --> 00:45:36,025 Which will be released 528 00:45:36,150 --> 00:45:40,196 into the warmer-water currents that they need to survive. 529 00:45:43,324 --> 00:45:45,743 It's a very emotional day for everybody. 530 00:45:45,868 --> 00:45:48,704 These are turtles that staff and volunteers at the aquarium 531 00:45:48,829 --> 00:45:51,249 have worked so hard to get them to that point. 532 00:46:12,353 --> 00:46:16,315 Changes in the ocean currents won't just harm turtles. 533 00:46:16,440 --> 00:46:21,404 With heat, oxygen and nutrients moving more slowly around the globe, 534 00:46:21,529 --> 00:46:24,740 the impact on all life could be dramatic. 535 00:46:24,865 --> 00:46:26,617 I mean, we live in a world 536 00:46:26,742 --> 00:46:29,996 where just one domino in a large game of dominoes, 537 00:46:30,121 --> 00:46:33,833 so you flick one piece, and you know what happens - everything starts to collapse. 538 00:46:33,958 --> 00:46:36,669 And that's exactly what we start to see over time 539 00:46:36,794 --> 00:46:38,379 as these conveyor belts slow down. 540 00:46:42,758 --> 00:46:47,930 Human activity is destroying the balance of our perfect planet... 541 00:46:50,266 --> 00:46:53,519 disturbing our oceans and disrupting our weather. 542 00:46:54,687 --> 00:46:58,149 But can we prevent the damage we're doing? 543 00:46:59,608 --> 00:47:02,069 "EREMY". Now, the human population's at seven billion. 544 00:47:02,194 --> 00:47:04,071 It's moving to nine billion. 545 00:47:04,196 --> 00:47:08,367 And the problem is, we're already using the equivalent of one and a half Earths. 546 00:47:11,287 --> 00:47:12,872 It's not sustainable. 547 00:47:15,082 --> 00:47:18,461 Around 80% of the energy we use 548 00:47:18,586 --> 00:47:22,840 still comes from burning fossil fuels. 549 00:47:22,965 --> 00:47:26,385 It's what makes us so dangerous. 550 00:47:27,678 --> 00:47:32,141 We can reduce CO2 emissions by consuming less 551 00:47:32,266 --> 00:47:36,145 or reusing some of our resources. 552 00:47:36,270 --> 00:47:38,773 But the biggest saving we could make 553 00:47:38,898 --> 00:47:42,485 would be to stop using fossil fuels for our energy. 554 00:47:43,569 --> 00:47:45,738 And there are many people who think 555 00:47:45,863 --> 00:47:52,036 that we could exploit the natural forces of the planet to enable us to do that. 556 00:47:56,499 --> 00:47:59,835 The sun does not send us a bill. 557 00:47:59,960 --> 00:48:02,129 The wind has not invoiced us. 558 00:48:05,966 --> 00:48:10,388 Coal, oil, gas, uranium, they're expensive. 559 00:48:10,513 --> 00:48:11,722 The sun and the wind is free. 560 00:48:17,603 --> 00:48:22,233 "ASHA". We live on a planet that's incredibly dynamic. 561 00:48:26,320 --> 00:48:27,738 We all live in environments 562 00:48:27,863 --> 00:48:30,699 where there is some source of energy that we can tap into. 563 00:48:30,825 --> 00:48:33,577 There's energy, there's power all around us. 564 00:48:39,208 --> 00:48:42,378 And we need to start looking at 565 00:48:42,503 --> 00:48:47,299 these natural sources of energy that don't have that negative impact. 566 00:48:53,973 --> 00:48:57,768 We have more energy than we '1! Ever know what to do with. 567 00:48:57,893 --> 00:48:59,270 We can power the whole world 568 00:48:59,395 --> 00:49:04,733 with just a fraction of the solar and wind that we get every year - a fraction of it! 569 00:49:12,366 --> 00:49:15,077 "NXALL". We're not going to start needing less power any time soon. 570 00:49:15,202 --> 00:49:18,414 We're just going to have to shift how we generate that power 571 00:49:18,539 --> 00:49:21,750 from non-renewables to renewables. 572 00:49:28,174 --> 00:49:29,550 Volcanic heat. 573 00:49:30,718 --> 00:49:33,012 So far, we've only tapped 574 00:49:33,137 --> 00:49:36,015 some 7% of its global potential. 575 00:49:38,434 --> 00:49:40,603 Or the wind in our skies. 576 00:49:42,188 --> 00:49:44,064 That could provide 577 00:49:44,190 --> 00:49:47,151 30% of our energy by 2050. 578 00:49:50,696 --> 00:49:53,115 And the power of the sun, 579 00:49:53,240 --> 00:49:56,660 which is virtually unlimited. 580 00:49:58,412 --> 00:50:02,458 In areas where most life struggles to survive... 581 00:50:04,001 --> 00:50:09,173 there is plenty of space to gather the maximum solar energy. 582 00:50:11,550 --> 00:50:18,015 The northern Sahara, home to the world's largest concentrated solar power plant. 583 00:50:22,603 --> 00:50:24,939 Here, innovative technology 584 00:50:25,064 --> 00:50:28,359 is using mirrors to superheat a special liquid 585 00:50:28,484 --> 00:50:33,030 to around 400 degrees Celsius. 586 00:50:33,155 --> 00:50:35,491 This heat is then stored in molten salt, 587 00:50:35,616 --> 00:50:40,704 allowing something not possible before, 588 00:50:40,829 --> 00:50:46,126 the ability to power steam turbines with the sun's energy during the night. 589 00:50:47,294 --> 00:50:50,923 It creates green electricity 24 hours a day, 590 00:50:51,048 --> 00:50:54,301 feeding Morocco's growing energy needs. 591 00:50:56,303 --> 00:50:59,056 And it has plans to supply Europe. 592 00:51:00,432 --> 00:51:03,227 We need to make enormous shifts in our society. 593 00:51:03,352 --> 00:51:05,229 This is starting, 594 00:51:05,354 --> 00:51:07,439 but it's happening just in small places. 595 00:51:07,565 --> 00:51:11,569 It needs to happen everywhere, and it needs to happen much, much faster. 596 00:51:11,694 --> 00:51:13,779 There's really no excuse. 597 00:51:13,904 --> 00:51:15,906 The Earth has all of the power we need. 598 00:51:17,700 --> 00:51:20,035 Our mission is not growth, growth, growth, 599 00:51:20,160 --> 00:51:22,037 but sustainability, 600 00:51:22,162 --> 00:51:27,334 and that our responsibility is to steward this planet. 601 00:51:27,459 --> 00:51:28,586 That's the mission at hand. 602 00:51:31,130 --> 00:51:35,968 But is this transition to a low-carbon society happening fast enough? 603 00:51:42,224 --> 00:51:46,186 In 2015, 195 of the world's nations 604 00:51:46,312 --> 00:51:50,858 pledged to reduce their carbon dioxide emissions. 605 00:51:54,028 --> 00:51:56,655 To avoid planetary disaster, 606 00:51:56,780 --> 00:52:02,494 the goal was to limit the warming of the Earth to well below two degrees. 607 00:52:04,163 --> 00:52:06,206 Together, citizens of the world, 608 00:52:06,332 --> 00:52:10,002 we will work to save our planet from ourselves. 609 00:52:12,796 --> 00:52:17,509 "BARACK OBAMA". Today's a historic day in the fight to protect our planet. 610 00:52:17,635 --> 00:52:20,596 You'll either be lauded by future generations... 611 00:52:22,097 --> 00:52:23,724 or vilified by them. 612 00:52:27,269 --> 00:52:29,438 To get an accurate reading 613 00:52:29,563 --> 00:52:31,649 of CO2 levels in the Earth's atmosphere, 614 00:52:31,774 --> 00:52:35,944 you must be far away from the pollution of the cities. 615 00:52:36,070 --> 00:52:38,364 So in the heart of the Amazon, 616 00:52:38,489 --> 00:52:44,453 they built a 325-metre tower to do just that. 617 00:52:44,578 --> 00:52:50,250 It's one of a number of towers around the planet collecting vital data, 618 00:52:50,376 --> 00:52:52,961 and the news is not good. 619 00:52:53,087 --> 00:52:55,923 This year, CO2 levels in the atmosphere 620 00:52:56,048 --> 00:53:00,302 went up yet again, hitting another record high. 621 00:53:05,516 --> 00:53:08,394 I think we are in a crisis. I'm not going to mince my words. 622 00:53:08,519 --> 00:53:10,354 We are in a crisis right now. 623 00:53:10,479 --> 00:53:14,149 We are pushing the equilibrium that the planet used to be in 624 00:53:14,274 --> 00:53:16,568 in a way that may be unrecoverable. 625 00:53:19,488 --> 00:53:21,365 Ana' what the scientists are telling us is, 626 00:53:21,490 --> 00:53:25,869 we will face a runaway cascade of environmental events 627 00:53:25,994 --> 00:53:30,708 feeding off each other, taking us into an unknown abyss 628 00:53:30,833 --> 00:53:34,920 that could lead to a very quick mass extinction of much of life on this Earth 629 00:53:35,045 --> 00:53:37,256 in a very, very short period of time. 630 00:53:39,466 --> 00:53:41,885 Species are becoming extinct 631 00:53:42,010 --> 00:53:45,889 around one hundred times faster than the normal rate. 632 00:53:46,014 --> 00:53:51,937 So rapid is the loss that zoos around the world are taking drastic action. 633 00:53:53,814 --> 00:53:58,485 They're collecting DNA from endangered species to build 634 00:53:58,610 --> 00:54:00,988 a genetic store of life before they go extinct. 635 00:54:03,198 --> 00:54:07,411 At Edinburgh Zoo, a health check on a Diana monkey 636 00:54:07,536 --> 00:54:08,787 presents a valuable opportunity 637 00:54:08,912 --> 00:54:14,793 to collect a sample for the European network of biobanks. 638 00:54:19,506 --> 00:54:25,053 We really feel the pressure to bank as many species as we can, 639 00:54:25,179 --> 00:54:29,349 as fast as we can, before it's too late. 640 00:54:29,475 --> 00:54:32,311 Martys Houck at San Diego Zoo 641 00:54:32,436 --> 00:54:36,482 receives DNA samples from all over the world. 642 00:54:38,108 --> 00:54:41,236 She's taking them to a secure vault. 643 00:54:45,073 --> 00:54:48,869 It's known as the Frozen Zoo. 644 00:54:48,994 --> 00:54:50,871 It's hard to imagine, 645 00:54:50,996 --> 00:54:53,957 but there's probably more vertebrate life in that room 646 00:54:54,082 --> 00:54:55,918 than anywhere else on the planet. 647 00:55:00,172 --> 00:55:03,467 We get samples every day. It might be a tiger, 648 00:55:03,592 --> 00:55:07,221 it might be a bear, it might be a rare reptile. 649 00:55:08,847 --> 00:55:14,186 Right now, we have over 10,000 individuals represented. 650 00:55:19,107 --> 00:55:21,902 The living cells of our world's rarest animals 651 00:55:22,027 --> 00:55:26,532 are being stored here at minus 200 degrees Celsius... 652 00:55:28,742 --> 00:55:33,080 keeping their DNA viable indefinitely, 653 00:55:33,205 --> 00:55:35,290 just in case the worst happens. 654 00:55:37,376 --> 00:55:41,213 There are multiple frozen zoos like this around the world, 655 00:55:41,338 --> 00:55:43,590 and with extinction rates so high, 656 00:55:43,715 --> 00:55:47,219 they might be needed sooner than we thought. 657 00:55:51,306 --> 00:55:54,142 I hope that we never have to see 658 00:55:54,268 --> 00:55:57,688 extinction of some of these amazing species. 659 00:56:01,316 --> 00:56:03,902 But if we do, the samples in the Frozen Zoo 660 00:56:04,027 --> 00:56:07,906 might be the hope for bringing them back, so that... 661 00:56:08,031 --> 00:56:10,826 our children and grandchildren 662 00:56:10,951 --> 00:56:13,287 could once again 663 00:56:13,412 --> 00:56:15,998 see the actual animals. 664 00:56:16,123 --> 00:56:20,669 Not knowing what the planet will be like when I'm an adult, 665 00:56:20,794 --> 00:56:23,255 not knowing whether it will be capable of sustaining life, 666 00:56:23,380 --> 00:56:26,383 that is a terrifying thing to face. 667 00:56:30,596 --> 00:56:32,598 I think the planet that I've been born into 668 00:56:32,723 --> 00:56:35,058 is the most beautiful place that I could ever imagine. 669 00:56:35,183 --> 00:56:38,312 It's full of amazing wildlife... 670 00:56:38,437 --> 00:56:41,523 and us - humans are incredible. 671 00:56:43,734 --> 00:56:48,322 But we seem to forget that the place that we live in is finite 672 00:56:48,447 --> 00:56:53,118 and very vulnerable, and it seems to be dying before our eyes. 673 00:56:59,833 --> 00:57:03,754 Since the age of ten, I've been hearing about our warming world, 674 00:57:03,879 --> 00:57:05,559 but nothing was really done at that time - 675 00:57:05,631 --> 00:57:08,425 all I observed at that time is sort of mass apathy. 676 00:57:12,262 --> 00:57:14,389 But what is positive is that the youth 677 00:57:14,514 --> 00:57:16,224 are standing up and are taking leadership. 678 00:57:16,350 --> 00:57:18,060 Save our planet! 679 00:57:18,185 --> 00:57:20,270 Save our planet! 680 00:57:20,395 --> 00:57:22,314 Save our planet! 681 00:57:22,439 --> 00:57:23,774 We need more people to care. 682 00:57:23,899 --> 00:57:26,610 We need more people to look at the facts and say, 683 00:57:26,735 --> 00:57:28,570 "I will do something about this." 684 00:57:31,156 --> 00:57:33,200 - Whose future? - Our future! 685 00:57:33,325 --> 00:57:34,952 - Whose planet? - Our planet! 686 00:57:35,077 --> 00:57:36,077 Whose future? 687 00:57:36,161 --> 00:57:40,791 50 we need to think about how we interact with the natural world. 688 00:57:40,916 --> 00:57:43,085 We need to view it not as a commodity 689 00:57:43,210 --> 00:57:46,088 but as a system that we are a part of... 690 00:57:55,514 --> 00:57:58,183 because we are inextricably linked 691 00:57:58,308 --> 00:58:00,727 to the natural world, and whatever happens 692 00:58:00,852 --> 00:58:02,604 to the oceans, 693 00:58:02,729 --> 00:58:05,607 whatever happens to the forests, 694 00:58:05,732 --> 00:58:08,819 whatever happens to the deserts, that will come back 695 00:58:08,944 --> 00:58:10,779 and it will happen to us. 696 00:58:25,168 --> 00:58:28,547 Right now, we have the capacity and knowledge 697 00:58:28,672 --> 00:58:31,091 to stop the damage we are doing. 698 00:58:33,218 --> 00:58:35,095 But what we don't have 699 00:58:35,220 --> 00:58:36,888 is time. 700 00:58:38,432 --> 00:58:41,184 My inspiration and hope for the future 701 00:58:41,309 --> 00:58:45,230 lies with the next generation. 702 00:58:45,355 --> 00:58:50,152 But we all have a responsibility to reduce our carbon footprints, 703 00:58:50,277 --> 00:58:52,946 harness the forces of nature for our energy 704 00:58:53,071 --> 00:58:56,116 and protect the natural world. 705 00:58:56,241 --> 00:59:01,538 The survival of humanity and our fellow creatures on Earth depends upon it. 706 00:59:03,123 --> 00:59:08,128 Do you want to be the last generation that signed the death certificate of humanity? 707 00:59:08,253 --> 00:59:11,840 Do you want to be the generation that sees the last elephant killed? 708 00:59:11,965 --> 00:59:15,761 Do you want to be the generation that sees the last fish fished out of the sea? 709 00:59:15,886 --> 00:59:19,431 Or do you want to be the generation and the individuals that turned it around? 710 00:59:19,556 --> 00:59:22,851 This is the single most serious moment 711 00:59:22,976 --> 00:59:28,148 in the 200,000 years that our species has been on this Earth. 712 00:59:28,273 --> 00:59:30,025 I see reason to hope. 713 00:59:31,109 --> 00:59:33,445 And I think we can. 714 00:59:33,570 --> 00:59:38,116 I think we, humans, we are incredibly intelligent animals, 715 00:59:38,241 --> 00:59:39,451 and we can, 716 00:59:39,576 --> 00:59:40,994 and we will, 717 00:59:41,119 --> 00:59:43,038 if we set our minds to it. 61483

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