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Like TLomon mentioned the tobacco industry is part of a well known conspiracy of the past. The tobacco industry was behind a PR campaign that counteracted scientific evidence which linked cigarette smoking to lung cancer.
Best Answer: Nicotine by itself has not been proven to cause cancer. As far as doing damage to your lungs, most e cigarette liquids contain propylene glycol, which has been used in theater fog machines during film production, night clubs, etc for years and has also been found to be used in asthma inhalers.