re: There have been confirmed ice ages (and thawings).

Amazing how many people on here dismiss climate scientists.1.4 billion cars in the world putting CO2 into the atmosphere, not to mention coal plants, and people are like, "that's fine, there aren't any consequences." Also, climate change means more severe weather of all kinds, not just heat waves. Whatever, we're already screwed for having done nothing about this despite decades of warnings from scientists who said we'd experience more severe hurricanes, wildfires and winters. It's happening everywhere, but I guess it's easier to stick your head in the sand.