NYC as Atlantis
Of course global warming will soon have a major impact on agricultural states like Vermont. But there's a history here of living off the land, so maybe we can find a way to get by.
For urban dwellers, things could be much worse. NASA is projecting a massive rise in sea levels unless we curb climate change. Here's a link to a dramatic image of what Manhattan could look like if the temperature rises 3°:
http://www.vanityfair.com/features/general/articles/060508fege01