"Studies do not demonstrate a link between thimerosal-containing vaccines and ASD [autistic spectrum disorders], and the pharmacokinetics of ethylmercury make such an association less likely. Epidemiologic studies that support a link demonstrated significant design flaws that invalidate their conclusions. Evidence does not support a change in the standard of practice with regard to administration of thimerosal-containing vaccines in areas of the world where they are used.

"So what? You say. The Head of the EPA doesn't have anything to do with vaccines. True enough. But RFK, Jr. has demonstrated himself on this issue not only to be prone to dubious science, but to have become a true believer in one of the most outrageous and dangerous forms of pseudoscience out there: antivaccinationism, or vaccine rejectionism. If you're trying to build an administration ostensibly devoted to using the best science as the basis for public policy, and the EPA is one agency where that is incredibly important, you do not want someone who is so prone to pseudoscience and promoting misinformation running that agency. Moreover, RFK, Jr's tendency to play fast and loose with science goes beyond mercury in vaccines and into the very area where he claims expertise, the environment, where he blames Katrina on global warming, for instance (not even Al Gore does that). Indeed, his assaults on fact and science are legendary, right up to describing the small Cuyahoga River fire (which lasted only 30 minutes and was never caught on film) as "exploding in colossal infernos." Apparently, any "science" is good to him, as long as it appears to support his agenda. Add to that his "not in my backyard" hypocrisy in opposing a proposal to build wind power turbines off of Martha's Vineyard, and it's hard for me to comprehend how Obama could consider him for a post even for a moment.