The world is more or less about to collapse, just FYI. Too hot, too many people, too much consumption - if the entire world consumed at the same level as Americans, for instance, we'd need five extra Earths. FIVE!!!
As it is, we could already do with an extra half-Earth. Nice one, humans.
But some humans are on the case, thank goodness. While we're busy hoovering up natural resources and breeding like oblivious field mice, they're thinking hard about how we got into this mess and how to get out of it.
Two of those people are renowned Stanford biologists Paul and Anne Ehrlich, who say overpopulation and overconsumption by the wealthy are hurtling us into the cold arms of nothingness.
According to the UN, the world's population is projected to reach 9.6 billion by 2050. And "The next 2.5 billion people will do much more damage than the 2.5 billion added since the 1970s," says Prof Paul Ehrlich, "because people use the richest, most easily extracted resources first."