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.

00:05:13 TRANSLATION: I've got no idea how many people live on the planet, no idea!

00:07:36 It's not people having huge families.

00:10:17 On average for almost all of human history, a man and a woman

00:12:45 NASA, we calculate and simulate everything.

00:15:10 The rest is locked up in mountain glaciers

00:18:10 The city authorities predict that these reservoirs

00:20:54 Lake Chad on the southern edge of the Sahara

00:23:25 How we're going to do that is through raising productivity

00:25:50 And in fact that's the seminal event, that's the Green Revolution.

00:28:18 such as foreign investors producing food in Ethiopia

00:30:44 But they aren't all his own.

00:33:25 and used it to get more from nature than had ever been possible before.

00:35:45 You look at a billion of barrels of oil and oil's $70 a barrel

00:37:42 the more we threaten our own survival.

00:40:05 Well, according to these calculations

00:42:02 urgently and there are three ways to achieve this.

00:44:21 It's like closing the door after the horse has gone.

00:47:10 Even too-young children are coming to school.

00:49:41 Rwandans understand that while it's wonderful to have children

00:51:53 Because we are at the top of the mountain

00:54:37 Even in the heart of a vast urban metropolis like Mexico City

00:57:14 Even setting aside the moral responsibility we have