"It would be nice if my colleagues would actually level with politicians about various "solutions" for climate change. The Kyoto Protocol, if fulfilled by every signatory, would reduce global warming by 0.07 degrees Celsius per half-century. That's too small to measure, because the earth's temperature varies by more than that from year to year.

The Bingaman-Domenici bill in the Senate does less than Kyoto -- i.e., less than nothing -- for decades, before mandating larger cuts, which themselves will have only a minor effect out past somewhere around 2075. (Imagine, as a thought experiment, if the Senate of 1925 were to dictate our energy policy for today).

...President Bush proposes that we replace 20 percent of our current gasoline consumption with ethanol over the next decade. But it's well-known that even if we turned every kernel of American corn into ethanol, it would displace only 12 percent of our annual gasoline consumption. The effect on global warming, like Kyoto, would be too small to measure, though the U.S. would become the first nation in history to burn up its food supply to please a political mob.

And even if we figured out how to process cellulose into ethanol efficiently, only one-third of our greenhouse gas emissions come from transportation. Even the Pollyannish 20-percent displacement of gasoline would only reduce our total emissions by 7-percent below present levels -- resulting in emissions about 20-percent higher than Kyoto allows.

And there's other legislation out there, mandating, variously, emissions reductions of 50, 66, and 80 percent by 2050. How do we get there if we can't even do Kyoto?" -- Patrick J. Michaels is a senior fellow in environmental studies at the Cato Institute and author of Meltdown: The Predictable Distortion of Global Warming by Scientists, Politicians, and the Media.