I am sure that there are studies showing that marijuana increases cancer risk, but here’s a study showing marijuana decreases cancer risk.
My guess: marijuana by itself slightly decreases cancer risk, but it’s usually smoked together with tobacco, which increases cancer risk to a larger extent.
My guess: marijuana by itself slightly decreases cancer risk, but it’s usually smoked together with tobacco, which increases cancer risk to a larger extent.
It’s commonly smoked together with tobacco in much of the world, especially Europe, but people in the USA typically smoke cannabis by itself.