The sub-zero temperatures across the state of Michigan this morning do not mean that global warming isn't real.
Jeff Masters, Director of Meteorology for Weather Underground, is explaining this a lot these days. He says the long-term trend is clearly a warming planet. But global warming doesn't mean 'no more winter.'
"The earth is still tilted on its axis," says Masters, "which means we get unequal heating of the poles, and that causes the seasons, and the seasons haven't gone away. We still expect cold weather, just less of it."