Hugh,
Yes that is true....I'm sure he made a lot of money from his misguided movie, "An Inconvenient Truth" that attempts to make appear that mankind is the cause of global warming and that we humans can do anything about it. I think a lot of people are making a lot of money on all this Global Warming, Greenhouse gas, Carbon Footprint, crap.
The Earth has endured all the volcanoes, hurricanes, earthquakes, meteor strikes, and numerous dramatic climate changes over the past 4 Billion years and has done it very well. Nearly 90% of all the animal species that ever existed on Earth are extinct and someday, humans will probably be extinct...especially if we are so arrogant to think we can fix mother Earth. We had nothing to do with any of the global climate changes of the past, and it's foolish to think we can control any future climate changes.
...Rich