Those are the people data today shows are at risk for developing cancer, similar to tobacco. If you do smoke marijuana heavily, talk with your doctor so they can stratify your risk and help determine if you may benefit from further evaluation
Strangelove: The Depeche Mode Experience, Aug
In indoor areas where people are smoking, the chemical contaminants in environmental tobacco smoke can build-up in the air, impacting the health of smokers and non-smokers alike
Avoid using cleaning sprays or alcohol-based solvents
Plastics When plastic is burned, it releases dioxins, furans, phthalates, and flame retardants, which can potentially increase the risk of cancer