There is in fact a consensus among the scientific community, from dozens of large, very thorough, and unquestioned studies.
The fact that a few studies funded by tobacco companies failed to find links is not at all surprising, and does nothing to contradict that consensus.
Further down in the linked article:
Quote:
". . . there are at least 50 very reputable studies that find a link between secondhand smoke and lung cancer and at least 50 others that find an increased risk of heart disease," says Thun.
Among them: Two findings from the newer Cancer Prevention Study II that began in the 1980s -- the follow-up to the study used for Enstrom's research -- that suggest nonsmokers face a 20% increased risk for both heart disease and lung cancer when exposed to secondhand smoke. "The consensus of multiple health committees from around the world, including the surgeon general, is that secondhand smoke is definitely related to lung cancer and heart disease, and may be also be related to chronic lung disease."
|