All secondhand exposure produced by cigarettes, e-cigarettes and vaping devices, cigarillos, hookah, and marijuana, can be harmful to your health. Secondhand smoke exposes Californians to toxic chemicals including 70 cancer-causing chemicals from cigarettes and at least 10 chemicals in e-cigarette aerosol identified by California’s Prop 65.


Nonsmokers exposed to marijuana secondhand smoke in a room without ventilation tested positive for THC for up to three hours following exposure.

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