As the planet warms regional climates will change. The precise details of how and when this will happen are still sketchy, but there is considerable concern that these changes, when they do come, will put tremendous pressure on our food systems. There is some (still very preliminary) evidence that this is already happening. Part of our response to climate change needs to include what has been called adaptation. These are approaches to reduce the vulnerability of our systems (like agriculture) to changes in climate, as well as approaches to help people manage the impacts of these changes on their lives.
An example of adaptation is today's announcement by the White House of the creation of "climate hubs" around the country. Check out a story abut the announcement here:
http://www.washingtonpost.com/blogs/post-politics/wp/2014/02/05/white-house-to-unveil-climate-hubs-to-aid-farmers-across-country/?hpid=z4
