Scientists warn that plant breeders will need to accelerate development schedules if they are to ensure the ever-growing population can be fed as global temperatures rise.
Greenhouse gases from cattle, fertilisers, manure and agriculture mean that human activities have turned the land and soil into part of the global warming machine.
Researchers warn that more areas of the world will swelter more often in potentially lethal heatwaves unless greenhouse gas emissions are drastically curtailed.