World food systems ‘pushed to the brink’ by extreme heat, UN warns

Severe heatwaves in commonly hot regions could leave farmers unable to work outside, with livestock mortality rates expected to riseExtreme heat is threatening the world’s food systems, with farmers unable to work outside, livestock experiencing stress and crop yields falling, putting the livelihoods of more than a billion people in peril, the UN has warned.Experts said food supply in some areas was being “pushed to the brink” by increasingly common and severe heatwaves, on land and at sea, in a...