Many foods depend on extremely specific climates. Not just current climates, but the history of climate for thousands of years -- soils to grow a good crop in develop over that time span. The corn belt is where it is not just because of current (well, 1950-1980) climate but because in the thousands of years before that, the soil improved and developed to the point of being able to support such farming. For something like corn, which is grown across a huge area, climate change can be an issue. But someone, somewhere, will probably be able to grow corn 30 years from now.
But many items grow in relatively small areas, subject to the whims of local change. Some of these are:
- Beer (hops)
- Wine (grapes)
- Horseradish (85% of the entire world's supply grows in a single county in Illinois)
I invite readers to check the sources linked to above. And to contribute their own crop types that are either sensitive to climate change, those which are insensitive, and those which would even benefit from expected changes. Please do include links to your examples.