David Battisti, Professor of Atmospheric Sciences at the University of Washington led a study (published in Science magazine) which focused on temperatures during growing seasons around the world, which allowed them to determine the effect on food supplies.
Their results show there is a 90% chance that average temperatures in the tropics and subtropics will be higher than the hottest heat waves of the past century. With more than 3 billion people living in those areas, most of whom rely heavily on locally produced crops for both food and income, the effects could be catastrophic.
