Amen. According to "A Brief History of Everything" (a fun read, BTW). At least fifteen times in its past the Earth has almost frozen over - to include glaciers at the equator. I think he says that we are at the tail end of an "ice epoch" that has lasted like ten million years. The current "Interglacial" (periord between glacier growth) has lasted about ten thousand years, a little longer than normal, but overall, our planet tends to be more on the icy side, and when it turns cold, you don't want to be around. Right now, fifteen percent of the planet is covered by ice (97% of all of the fresh water) with another ten percent covered by permafrost.
If we are getting a degree or two warmer, we should probably enjoy it, perhaps g
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