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In addition to protecting non-smokers from secondhand aerosol, including e-cigarettes in smokefree laws may help reduce smoke detector false alarms, unnecessary evacuations, and wasting of financial and fire-related resources associated with e-cigarettes setting off smoke detectors

The hazy spot is the internal construction of the 12v plug itself, and the spring @Lscottomentions inside the plug that allows the center pin of the plug to move and maintain contact with the positive center conductor in the socket

A smokers lung shows patches of inflammation, likely due to chemicals from the smoke

Or you can go to theres a couple of particularly helpful websites