is weed safer than cigarettes Health Risks of Secondhand Smoke and Aerosols Factsheet More than one-third of U.S.

More than one third of U.S. teens have used at least one substance by age 16, according to a new study led by researchers at the University of California San Diego that found Many Americans wrongly believe exposure to marijuana smoke is safer than tobacco, study finds CNN London Numerous studies show that smoking marijuana is associated with fewer health risks than smoking tobacco. Research from the University of California, Los Angeles, for instance, found no significant link between Measuring PM2.5 concentrations from secondhand tobacco vs. marijuana smoke in 9 rooms of a detached 2 story house ScienceDirect

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