tobacco to weed ratio Measuring PM2.5 concentrations from secondhand vs. marijuana smoke in 9 rooms of a detached 2-story house The link between cannabis and
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9,750 deaths a year in the U.S
EXCELLENT CONDITION, UNUSUAL
The weight of the literature instead finds similarly small externalities, but some notable exceptions actually find social savings from smoking (although these tend to be in countries with higher public expenditures on health than the United States)
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