GEORGIANA GORDON STRACHAN

Heat projected to kill nearly five times more people by 2050

Lethal heat was just one of the many ways the world's still-increasing use of fossil fuels threatens human health, according to The Lancet Countdown, a major annual assessment carried out by leading researchers and institutions. More common droughts will put millions at risk of starving, mosquitoes spreading farther than ever before will take infectious diseases with them, and health systems will struggle to cope with the burden, the researchers warned.