Lots of it
According to Glantzs Web site, the institute concluded that: Glantz says he was thrilled by the conclusions made in the study, available online at After several years of banging our heads against the wall there is some movement on this subject, Glantz says
Provenance and peer review Not commissioned
The researchers noted that, Cannabis smoke is qualitatively similar to tobacco smoke, although it contains up to twice the concentration of the carcinogenic polyaromatic hydrocarbons. The National Institute on Drug Abuse states that, Marijuana smoking is associated with large airway inflammation, increased airway resistance, and lung hyperinflation, and those who smoke marijuana regularly report more symptoms of chronic bronchitis than those who do not smoke. Furthermore, a study by the California Office of Environmental Health Hazard Assessment found that weed smoke contains at least 33 individual carcinogens present in both marijuana smoke and tobacco smoke, such as benzopyrene and benzanthracene
They also stick to anything that is not, like leather and vinyl
North America Tobacco Market Size and Forecast, by Form (2025-2032) 8.3.1