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I have never "railed against
the notion of global warming". In point of fact I told my astronomy
students just yesterday* that there is scientific consensus that the
Earth has warmed over the last century by a half degree Celsius, plus
or minus a half degree or so. I hope any readers who have joined the
group since that discussion will recognize the nature of his claim.
Leigh
*This was in response to a question about the relative severity of
winters and summers in the northern and southern hemispheres of
Earth. I wanted to emphasize the fact that it was more difficult to
determine the global temperature history of Earth than it is to
determine the global temperature history of Mars.