Associated Press: Global warming would be bad news for all those amber waves of grain, and for the corn and soybeans that are plentiful throughout the Midwest. “The grain-filling period” – the time when the seed grows and matures – “of wheat and other small grains shortens dramatically with rising temperatures. Analysis of crop responses suggests that even moderate increases in temperature will decrease yields of corn, wheat, sorghum, bean, rice, cotton and peanut crops,” according to “Global Climate …