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Insight: When did you first get interested in the question of global warming as an example of bad science?
Fred Singer: My interest in the global-warming scare began about 1988 with the testimony of Jim Hansen (then head of NASA's Goddard Institute for Space Studies) before Sen. Al Gore in a Senate hearing. I looked at his testimony and discovered some holes in it. I published a piece in the Wall Street Journal pointing out the weak points in the argument.
Q: What are some of the weak points about the global-warming argument?
A: The fact that they don't properly take into account the effects of clouds in the atmosphere. Clouds will cool the climate rather than warm the climate. When you try to warm the ocean, I argued - and the argument is still sound - you evaporate more water and create more clouds and this reduces the amount of solar radiation. What you have is a kind of negative feedback which keeps the temperature from rising very much.