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After a year filled with superstorms, droughts, floods, and wildfires, there’s little doubt that climate change is having a dramatic impact on our lives. But it also threatens to cause more subtle impacts on our health. And we’re just starting to get a handle on what they might be. The latest? It looks like climate change and its effect on food production might take the obesity crisis in the U.S. to a whole new level.

A series of letters in the current issue of the American Journal of Public Health — all of which are highly speculative — explores the relationship. The theory comes out of recent work on the links between food prices, “food insecurity,” and obesity.