I disagree.
We are talking about a 1 or 2 degree rise in average tempatures over a period of 50+ years.
The Midwest will still grow more corn and soybeans than any other region of the world. In fact, production will almost certainly increase as the growing regions expand northward. Corn is afterall, a tropical plant.
People will use less fossil fuels as the use of heat pumps will become more widespread with moderate winter tempatures.
And our quality of life will improve as more people are able to play golf well into January as far north as Minneapolis...