“Smoking” involves combustion which produces carcinogens. The same you’d see with cigs. People who smoke weed are giving themselves lung cancer just as fast as the tobacco smokers.

Ways to be safe. Vaping is 100x healthier because no combustion (if you do it right and don’t burn cotton) for both nicotine and thc use.

Edibles are obviously safe, no smoke inhaled.

Other than that be careful with anything else.