How Many People Can Live On Planet Earth

From the drought-stricken Colorado River, which is struggling to irrigate the farms upon which millions of Americans rely, to Mexico City, trying to cope with water rationing, the program reveals how scarce resources are affecting people all over the planet.
But this future is not inevitable. Experts discover that while countries as diverse as Canada, Turkey and Russia negotiate rights to sell freshwater to the world’s ever-expanding dry-lands, the richest countries in the Middle East are piloting solar desalination plants to provide fresh water and irrigate farms in the desert.
Improvements in social policy and global cooperation also offer hope. Research has shown that where women are emancipated and literate and where family planning is freely available, birth rates decrease.
But should population control be the duty of each one of us? David Attenborough asks whether we should all commit to smaller families for the sake of all humanity and the survival of planet Earth.