do most e cigarettes contain only water and flavoring Vaping Vapor Hiding Dangerous Ingredients: E-Cigarette

[124] The power source is the biggest component of an e-cigarette, [19] which is frequently a rechargeable lithium-ion battery

There's no automatic fine for a first accidental offense TSA's focus is safety, not punishment

But even if it were clear that menthol smokers are less likely to quit, that would not necessarily mean menthol cigarettes are inherently more "addictive." That debate tends to obscure the tastes, preferences, personal characteristics, and circumstances that are crucial to understanding why some people never smoke, some start but eventually quit, and others continue smoking

Tobacco smoke contains cancer-causing chemicals that damage the DNA of lung cells, which causes mutations that make cells grow out of control