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Nah. It's really as simple as this: Southern climates are moving north. (In the northern hemisphere.) If you want a vision of the future, consider a New England that looks more like the Southeast. There will be winners and losers. As climate zones move toward the poles, weather patterns and agricultural viability will shift with them. This will eventually turn current breadbaskets into deserts while warming up northe…
Let’s say the end of our civilization and going back to middle age or something like that.
The most dramatic story about that is what happened to the settling of Greenland (more than once). Basically during a cold spell the city was gradually abandoned, with sometimes the last few people literally freezing to death when their fuel ran out.