Firefighters have above-average rates of cancer, including lung cancer. This suggests that inhaling lots of smoke from ANYTHING on the regular isn't good for you. Example: https://www.nbcnews.com/health/cancer/cancer-biggest-killer-...
However, it is not debatable that they are the primary causative agents in tobacco-derived cancers. [0]
[0] https://en.wikipedia.org/wiki/Tobacco-specific_nitrosamines
Burning known and non debatable evidence of toxic chemicals in tobacco leaves harvest curing.
Marijuana comes out ahead.
So much misinformation about drugs. Heroin is safer than alcohol if moderately consumed. Addiction wise, not so great. but Tobacco is said to be harder to quit than heroin.
I can attest to that.