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I don't know why you were downvoted, I think it's a good question. My understanding is that this is a 4 degree difference in the average temperature. Meaning th

I don't know why you were downvoted, I think it's a good question. My understanding is that this is a 4 degree difference in the average temperature. Meaning there might be times of the year that don't change much at all but other seasons get dramatically hotter. That affects rainfall distribution, the speed that snow melts (and wether snow ever falls in the first place), etc. My guess is that "uninhabitable" in this context refers to specific critical periods that are deadly short of water or deadly hot which last long enough to make building/maintaining cities in those places a losing (i.e. prohibitively expensive) proposition

skinnymuch 7y ago
Maybe people thought I was against believing in man made climate change? I remember a year ago I posed a similar question amongst a liberal crowd (of which I’m one as well) and someone took it upon himself to be sure I believed there is no man made climate change. I’m pretty sure he just didn’t know anything either and enjoyed being offended. That’s not what’s happening here exactly but perhaps some people thought I wasn’t being genuine. Thanks! Yes that’s a big difference if it’s average and some seasons might not change much. That would be a big difference. Uninhabitable explanation makes sense too. Thanks.