Firstly, there is the visible smoke itself, the 'particle' aspect
In Downes v
Larsen K, Faulkner GEJ, Boak A, Hamilton HA, Mann RE, Irving HM, et al
De Tocqueville makes the point that violent revolutions become rare when the people are able to obtain property, and that trade (or voluntary exchange) is the natural enemy of all violent passions. The more property is widely held and distributed the less likely there is to be a revolution, since a revolution is likely to threaten the average persons property holdings
They may feel sick if they dont get more
Health harm varies based on a number of factors ranging from the level of nicotine, device type, ingredients used, battery type, how old the device is and importantly variations made by specific users and use patterns