How Many People Can Live On Planet Earth

00:00:06 This is the Earth, our planet.

00:02:43 And now the relentless increase of atmospheric pollution.

00:05:20 Luckily, the size of the human population is studied very closely.

00:07:47 We also have a good idea of where these additional people will live.

00:10:29 Extending life by controlling disease

00:13:00 Doug and his team have to calculate their daily requirements

00:15:30 There's more water in different parts of the world.

00:18:56 TRANSLATION: Unfortunately, I think there's going to be water shortages

00:21:26 and their by-products can be damaging to our seas.

00:24:07 decided to do something about it.

00:26:49 Arable land suitable for cultivation is becoming a scarce commodity

00:28:59 how destabilising these kinds of pressures can be as Rwanda.

00:31:53 If we cannot grow the economy fast enough to meet this growth

00:34:23 This is our office, our base of operations and what we do.

00:36:26 to many nations as well as individuals are proving to be a double-edged sword.

00:38:46 You simply divide the total productivity of the Earth

00:40:59 which most of us in Europe and North America

00:43:16 there'd be 400 million more people in China -

00:46:08 How many of you have only one child in the house? Raise your hands.

00:48:29 have been choosing to have smaller families than their parents did.

00:51:03 When it comes to other ways of reducing human impact on the Earth

00:53:49 If we lose the forest, we lose the water.

00:56:30 If that's the case, food and most other resources

65:00:00 square kilometres.