Subtitle preview:
1
00:00:38,720 --> 00:00:40,440
A hundred years ago,
2
00:00:40,520 --> 00:00:44,320
there were one-and-a-half billion people on Earth.
3
00:00:46,200 --> 00:00:50,760
Now, over six billion crowd our fragile planet.
4
00:00:52,520 --> 00:00:57,480
But even so, there are still places
barely touched by humanity.
5
00:01:03,120 --> 00:01:07,160