It was at the beginning of March that global warming deniers claimed that 2007 was part of a cooling climate trend in spite of the fact that 2007 was the 5th warmest year on record. It was a seriously flawed argument, of course, of the same sort that might claim that there is no global warming because yesterday was not as warm as the day before yesterday.

Now, a month and a half later, it has been calculated that March 2008 was the warmest March ever recorded on land, and the second warmest march ever for the whole globe, land and sea.

Does this extraordinarily warm March prove global warming? No, not in itself. It’s a mistake to look at any one incident as proof in itself as evidence of a trend. Only an idiot would watch one stock broker make one trade, and on the basis of that trade alone, make a statement about the performance of the stock markets in general.

That doesn’t mean that the individual incidents are unimportant, however. Keep track of the activities of all the stock brokers in all the markets, and some very solid evidence of trends can be found. That’s just the sort of thing that climate scientists who tell us about global warming have been doing, and they’ve been doing it for decades.

Those who blabber on about 2007 being an abnormally cool year miss this point, much in the same way that some people still insist that the Earth is flat because it looks flat from where they stand.