What they are is *relatively* harmless compared to lit tobacco, which is not only a perfectly valid piece of objective assessment based on the evidence we have, and the materials science we know extremely well (although in a slightly backhanded way e-cigarette use long term might be like losing the tips of all your fingers, whereas smoking is like being run over a series of articulated lorries, that are on fire, such is the massive harm smoking does) but that relative harm *is* the actual important point
It can also lead to a predisposition to addiction, both to nicotine and other substances
With FDA regulation looming, some companies have worked to distance themselves from e-cigarette terminology by giving their products other monikers such as e-hookahs and vape pens. Other companies have given their e-cigarettes greater flexibility by allowing them to vaporize loose leaf tobacco and other nicotine products along with e-liquid
Loose Tobacco: The core of a hand-rolled cigarette is the tobacco
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