What really is vapor?
Vapor, as used in the context of a tobacco or nicotine vaporizer, is more properly described as a condensation aerosol, since what a user breathes is a mist (similar to steam) in which the active ingredients and flavor compounds which were present in the tobacco as OILS, have been evaporated (vaporized) into gasses, and then have re-condensed into small droplets generating a mist, fog, or vapor.