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America’s air is clean and safe. But Americans will not be learning this from CASAC’s advice to the EPA. Whether this is because CASAC’s members are incompetent or corrupt is anyone’s guess.

But thanks to Mr. Barton, the subject has been broached. Let the debate and investigation begin.

Steve Milloy publishes JunkScience.com and is the author of “Green Hell: How Environmentalists Plan to Control Your Life and What You Can Do to Stop Them” (Regnery, 2009).