... I believe the lesson was that with a catchy name, a strong policy position and an aggressive media campaign, nobody will dare to criticize the science, and in short order, a terminally weak thesis will be established as fact. After that, any criticism becomes beside the point. The war is already over without a shot being fired. That was the lesson, and we had a textbook application soon afterward, with second hand smoke.
In 1993, the EPA announced that second-hand smoke was "responsible for approximately 3,000 lung cancer deaths each year in nonsmoking adults," and that it " impairs the respiratory health of hundreds of thousands of people." In a 1994 pamphlet the EPA said that the eleven studies it based its decision on were not by themselves conclusive, and that they collectively assigned second-hand smoke a risk factor of 1.19. (For reference, a risk factor below 3.0 is too small for action by the EPA. or for publication in the New England Journal of Medicine, for example.) Furthermore, since there was no statistical association at the 95% coinfidence limits, the EPA lowered the limit to 90%. They then classified second hand smoke as a Group A Carcinogen.
This was openly fraudulent science, but it formed the basis for bans on smoking in restaurants, offices, and airports. California banned public smoking in 1995. Soon, no claim was too extreme. By 1998, the Christian Science Monitor was saying that "Second-hand smoke is the nation's third-leading preventable cause of death." The American Cancer Society announced that 53,000 people died each year of second-hand smoke. The evidence for this claim is nonexistent.
In 1998, a Federal judge held that the EPA had acted improperly, had "committed to a conclusion before research had begun", and had "disregarded information and made findings on selective information." The reaction of Carol Browner, head of the EPA was: "We stand by our science?.there's wide agreement. The American people certainly recognize that exposure to second hand smoke brings?a whole host of health problems." Again, note how the claim of consensus trumps science. In this case, it isn't even a consensus of scientists that Browner evokes! It's the consensus of the American people.
Meanwhile, ever-larger studies failed to confirm any association. A large, seven-country WHO study in 1998 found no association. Nor have well-controlled subsequent studies, to my knowledge. Yet we now read, for example, that second hand smoke is a cause of breast cancer. At this point you can say pretty much anything you want about second-hand smoke.
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