The best, IMHO, alternate explanation for global warming is looking a bit less likely:
“The upshot is that somewhere between 1985 and 1987 all the solar factors that could have affected climate have been going in the wrong direction. If they were really a big factor we would have cooling by now.”
Reason Magazine science editor Ronald Baily adds:
Of course in areas that are prey to big uncertainties, no study is definitive. However, as the evidence for man-made global warming continues to accumulate, policymakers and citizens should turn our attention to what should be done about it. See some of my thoughts on the carbon taxes vs. carbon markets here.
Disclosure: Just in case any H&R readers missed it, I am a former skeptic of man-made global warming. See my mea culpa here.