Grist: The days of "king corn" could be numbered as climate change brings higher temperatures and water shortages to America`s farmland, a new report warned on Wednesday.
Nearly one third of U.S. farmland is devoted to raising corn and the country produces about 40 percent of the world`s corn crop. But the $1.7 trillion industry - the equivalent of Australia`s GDP - is under threat from water shortages, heat waves, and unpredictable rainfall caused by climate change.
"Corn is an essential input to...