• How many people can Earth handle?

Estimates vary, but we’re expected to reach “peak human” around 2070 or 2080, at which point there will be between 9.4 billion and 10.4 billion people on the planet. It may be a slow process – if we reach 10.4 billion, the UN expects the population to remain at this level for two decades – but eventually after this the population is projected to decline.