ScienceDaily: Drought and extreme heat events slashed cereal harvests in recent decades by 9% to 10% on average in affected countries -- and the impact of these weather disasters was greatest in the developed nations of North America, Europe and Australasia, according to a new study led by researchers from McGill University and the University of British Columbia. At a time when global warming is projected to lead to more extreme weather, the study, published in Nature, provides the most comprehensive look yet...