At the Chicago Board of Trade, commodity prices for corn and soybeans have soared in recent days, as severe weather continues to hamper the spring planting season. Farmers across the Central United States report flooding and an unprecedented string of deadly tornadoes have left millions of acres of farmland impossible to sow. Environmentalist Bill McKibben tweeted, “Normally, at this point in season 90% of America’s corn crop is in the ground. But thanks to endless rain, it’s 58% this year. For soybeans, 29% planted instead of the usual 66%. A hotter planet=more rain and more drought (and horribly stressed farmers).”