> I've heard people say that both warmer weather and colder weather are both evidence that the climate-change theory is right. The evidence that the climate is

> I've heard people say that both warmer weather and colder weather are both evidence that the climate-change theory is right. The evidence that the climate is warming isn't "warmer weather" or "colder weather". It's that average sea-temperatures around the world have been rising steadily, year-on-year. The predicted effect of that rising temperature on the weather is that we should expect more extreme weather: more floods, more droughts, colder cold-snaps. It's no good looking at "weather" (e.g. California) to see whether global climate change is happening; weather is a local phenomenon. Mann is vindicated by the behaviour of the (global) climate, not the behaviour of the weather in San Francisco.