Link to study that shows nicotine causes cancer?
Not tobacco, not cigarettes, nicotine.
We'll be waiting a long time for that one...
I started smoking at age 10; at age 62 I tried an e-cig "just for the hell of it," fully expecting it to be unsatisfying, or "just as nasty, or whatever... I inadvertently quit "smoking" on the spot... two years later, still happily cigarette free. My wheezing when climbing stairs went away almost immediately (I noticed this 12 hours later). No more huffing and puffing. No scent of "tobacco" and associated tars, etc, on my clothes, in the car, in the house. Friends who were "allergic" to smoke invite me to vape at will in their homes and cars.
I had one nasty "accident." I had a pocket full of quarters (extremely rare for me, as I hate "change") that I was going to dump in the console of the car, for parking meters, and put a battery (not an e-cig, just the battery) in the same pocket. My pants caught fire while I was taking a leak. Stupid? Yeah, definitely. Related to vaping? Not in the least. The quarters provided a closed circuit for the battery. Really dumb. But...vaping? One of the brightest "choices" I ever made.
Almost all of the anti-vape, "we need regulation", etc., "ads" and "PSAs" out there, are funded by big tobacco, in an effort to "regulate" all the mom 'n' pop vape retailers, juice mixers, and gadget head makers into oblivion, so that Big Tobacco can take over the industry. I try to avoid the Chinese marketplace, as a safety precaution. I recommend others do the same.
And I'm saving a shitload of cash, vaping organic naturally-extracted flavoring of tobacco, with USP-grade nicotine. Even with high-end vaping gear, a total economic winner. People in the US are exposed to tens of thousands of chemicals, on a daily basis, that have never even been screened for carcinogenic properties. I'll take my chances with nicotine & caffeine... everybody else can sit in their "smoke-free" bars and parks/stadiums (etc) and tut-tut themselves into early sugar- and booze-enabled graves. RIP suckers...