inhaling any type of smoke is bad for your lungs. Combustion of organic material releases carcinogens. That is pretty basic science.

https://www.lung.org/stop-smoking/smoking-facts/marijuana-an...

ZERO mention of cancer on that page.

Smoking WHILE on cancer therapy: "A number of small studies of smoked marijuana found that it can be helpful in treating nausea and vomiting from cancer chemotherapy."

Anti-cancer benefits: "More recently, scientists reported that THC and other cannabinoids such as CBD slow growth and/or cause death in certain types of cancer cells growing in lab dishes. Some animal studies also suggest certain cannabinoids may slow growth and reduce spread of some forms of cancer."

Source: https://www.cancer.org/treatment/treatments-and-side-effects...

Note: The American Cancer Society page on "marijuana and cancer" doesn't mention lung cancer at all.

I was blown away when I first discovered this. I smoked weed when I was younger and my only gripe about it was the possibility of lung cancer. Luckily my non-weed-smoking friend debunked that for me. Props for spreading interesting info!