system
Given the following post, respond as if you're commenting on Reddit:
human
How does cannabis NOT cause cancer?

I know that when cannabis is burned it creates hydrocarbons and benzopyrene; known carcinogens. Its also an immunosuppressant, how is it that there are no cases of cannabis inflicted cancer?
gpt
It is near impossible to prove a causal relationship here. Same for cigarettes, it's all correlational data- this was a major defence the tabacco industry utilized to shut down suits filed by individuals looking for liability on the corporations' part for the individual's case of cancer.

There are likely many individuals with lung cancer that would likely not have it had they refrained from marijuana use. But the cancer can't be traced in this manner- only long term increased risk due to smoking can be assessed. In regards to that, there are little data on the longitudinal effects of marijuana use, since it is a controlled substance. For medical purposes, marijuana strains are being manipulated to have few carcinogenic risks- namely, edibles and inhalants. The average smoker can be assumed to be raising their risks for cancer, but the data on the specifics just isn't rock solid yet.