Vaping is the act of inhaling a heated, aerosolized substance. It is critical to distinguish vaping from smoking. Smoking is the inhalation of a burned substance. The main difference between the two How are Non Combusted Cigarettes, Sometimes Called Heat Not Burn Products, Different from E Cigarettes and Cigarettes? FDA What is an e cigarette? BBC Science Focus Magazine Construction of electronic cigarettes Wikipedia Spin, Science and E Cigarettes CBC Radio Experts hazy on smokeless smokes' risks The Seattle Times