Global warming endangers U.S. corn production, study says

Global warming could rob the U.S. economy of $1.4 billion a year in lost corn production alone, a national environmental group estimated in a report released Thursday. The Environment America study, based on government and university data, projects that warming temperatures will reduce yields of the nation's biggest crop by 3% in the Midwest and the South compared with projected yields without further global warming. Iowa would be hit hardest, losing $259 million a year in corn revenues, followed by Illinois at $243 million. California, which leads the country in agriculture but doesn't grow much corn, would take an estimated $4.7-million hit. The study doesn't directly address other crops, but one of its main sources, a 2008 government report on the effects of warming on agriculture and natural resources, suggests that California's signature fruit and vegetable harvests could suffer even more than corn if temperatures rise...LA Times

The study is here.