In a previous post I discussed wildly inaccurate reports on a phenomenon called "global dimming" which was being interpreted as a reason, oddly enough, for continuing to pollute the atmosphere in an effort to reduce the effects of global warming. RealClimate says that global dimming is not well understood or documented, certainly not in the way depicted in a recent BBC documentary, and its affects are not likely to be the ones touted in the documentary. The two posts are here and here.
(Comments are open to all. After clicking on "Comments," click on "Or Post Anonymously" if you don't have an account. See the list of environmental blogs on my sidebar.)