Any type of smokeless tobacco is considered a form of tobacco harm reduction because it does not involve smoke or tar. This typically includes snus, chewing tobacco, tobacco strips-lozenges-stick-gum, and . These products can provide nicotine without lighting tobacco on fire and inhaling it, thereby reducing the harm caused by the smoke and tar from tobacco. Nobody is going to claim these products are 100% safe, but many claim they are safer than smoking tobacco. It is another way to approach the problem, and it is gaining popularity quickly thanks to e-cigarettes.

In light of these findings, the best that the study authors could do to implicate electronic cigarettes as a human health hazard was to proclaim that "e-cigarettes are not emission-free." If that is the worst thing that thsee researchers can say, then it certainly doesn't appear to rise to the level of a known health hazard for which government intervention is necessary at this time.

The authors of this study make one of the most cardinal errors in all of epidemiology. They ignore the principle that "correlation does not equal causation."

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