Des Moines Register: The odds of a major production slowdown of corn and wheat are as much as 20 times greater with climate change, according to researchers at Stanford University and the National Center for Atmospheric Research. The authors used global climate computer models, along with data about weather and crops, to calculate the chances that climatic trends would slow the growth in yields by 10 percent during the next 20 years. The result, researchers found, would mean yields would grow about half as quickly as...