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Re:San Francisco Becomes First U.S. City to Pass an E-Cigare... by driverdan on Tuesday June 25, 2019 @08:03PM (#20280590)
What are you talking about? Smoking is inhaling the smoke of a burned product. Vaping is not. It's not comparable. The bad part of smoking tobacco is not the nicotine, it's all of the terrible health effects of inhaling smoke. Other than addiction nicotine has very few negative health effects.
Re:San Francisco Becomes First U.S. City to Pass an E-Cigare... by munk-a on Tuesday June 25, 2019 @08:08PM (#20280626)
There are health effects of e-cigarettes aren't fully known but there are well known health risks associated with tobacco aside from the ash (which still can be present in mis-tuned vapes but is greatly reduced), see this other comment[1].

[1] https://news.ycombinator.com/item?id=20280258