As we approach Earth Day, this subject has popped up again.

I have written about this in the past and it has been posted on many green blogs and news sites, I just want to summarize again.

Weather events are not climate; climate is the accumulation of weather events over an extended period of time. So a cold summer day doesn't prove global warming is false any more than a heat wave in winter proves it's true.

That said, the effects scientists predict from global warming are sometimes counterintuitive. While snow is associated with winter, warmer winter temperatures can result in more snow, since warmer air can hold more moisture. One of the most well-documented predictions about global warming is that it will result in more intense storms, in any season, but may leave longer droughts between those storms.

And again, the long term chart: