Prior to this study, the most significant health concern regarding passive vaping was the possibility of exposure to carcinogenic and toxic aldehydes and pyrolysis products including formaldehyde, acrolein, and acetone. However, this study found no increase in concentrations of any of these pollutants under realistic (real-life) conditions.

The ironic thing is that no one actually disagreed with me on the science. Most of the advocates of smokeless tobacco acknowledged that there is a small, but real, causal relationship between traditional smokeless tobacco use and oral cancer (this relationship does not appear to hold for snus). However, simply because I made the statement that this causal link exists, I was blasted. Apparently, the simple statement that smokeless tobacco causes oral cancer is too much for many harm reduction advocates to tolerate.

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