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Their popularity has grown worldwide to the point where Action on Smoking and Health recently estimated the numbers of users in the United Kingdom had grown from 700,000 in 2012 to 2.1 million this year.

The average cigarette smoker inhales directly into the lungs, which can increase the risk of lung cancer, chronic obstructive pulmonary disease (COPD), and heart disease

In our opinion, marijuana should be regulated more like tobacco products, where excise taxes support prevention and treatment, advertising is limited, and nonsmokers are protected from secondhand exposure to marijuana smoke and aerosol

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Tobacco Addiction: A Biochemical Model of Nicotine Dependence

Smoking alters the airways and air sacs (alveoli) in the lungs