Unless immediate action is taken, climate change–related food shortages will account for more than half a million adult deaths by 2050, predicted epidemiologist Andy Haines. Writing in the New England Journal of Medicine (NEJM), Haines laid out the future in stark terms: Millions more will be subjected to flooding; 250,000 will die annually between 2030 and 2050 from heat stroke, disease, and coastal flooding; and global poverty will increase.