chemicals found in chewing tobacco Chemical characterization of smokeless products from South Asia: Nicotine, unprotonated nicotine, tobacco-specific N′-Nitrosamines, and flavor compounds Chemistry and toxicology of smokeless
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And smokeless tobacco or raw tobacco leaves can be treated differently
In addition to the already very good answers here I will refer to this essay: Talks about symbolism of smoking including personal imprfections loss of innocence coping with the past For me it also symbolizes a comfort and congizance of death

In 2015, Blu was acquired by Imperial Brands and its former SkyCig cigalike offerings reduced in favour of pod systems and e-liquids before eventually cigalike production ceased altogether

All top-up e-liquid bottles, pods/tanks containing e-liquid must be stored in the clear plastic bag provided at security in your hand luggage

This blockage not only causes discomfort but also alters the natural balance of bacteria in the gut

They let them run through it like they just got paroled