How hot could Earth get before it’s uninhabitable for humans?

JACOB HIPKISS, SOUTHWELL

Humans need to sweat to survive in warm conditions, and that’s only possible if the combination of temperature and humidity – known as the wet-bulb temperature – stays below around 35°C. According to a 2012 study by scientists at MIT, this limit could be reached globally if our planet warms by around 12°C. Fortunately, few scientists think global warming will do this in the foreseeable future. RM