Does climate affect global food prices?

A new study featured in the Washington Post says that global warming has stunted the growth of corn and wheat crops in Russia, China, Mexico and elsewhere, contributing to a long-term rise in food prices:

Report: Global warming already crimping crop production, pushing prices higher

But, a University of Nebraska professor contends that it’s not clear that the study captured how well farmers can respond to changing temperatures.

Some experts say that studies like these should motivate governments and seed companies to develop heat and drought-resistant crops.

What do you think? How can farmers around the world adapt to changing temperatures while keeping food costs down?