Grist: You can bet the farm that climate change is happening and that it will change the way we approach agriculture. For example, heres the climate science forecast for Illinois 20 to 40 years from now: temperatures akin to todays mid-South and rainfall patterns comparable to present-day East Texas. That may sound OK to you right now all bundled up in blankets in the middle of winter but you might feel differently when the summers start getting toastier. And according to a study recently published...