I always figured the carbon offset was like Bonsai Kitten, but this is a good comparison too.
UPDATE 2:50 PM: McQ adds some very interesting information in the debate. Turns out there is a much higher correlation between sunspots and global temperatures than previously suggested. Not proof positive, but those who have implied that the correlation of carbon dioxide and temperatures is "proof" will look real foolish trying to use the "correlation does not imply causation" argument. (Another possibility is that carbon dioxide increases may be driven by increased sunspot activity or greater temperatures, but this may be harder to prove.)