is weed or tobacco worse Are There Risks From Secondhand Marijuana Smoke? Early Science Says Yes – Houston Public Media Vaping weed is popular, but
Vaping weed is popular, but there are many unknowns about its safety : NPR Smoking pot vs. tobacco: What science says about lighting up FOX 5 Atlanta Scientific Statement: Cannabis use shows substantial risks, no benefits for cardiovascular health; more research is critical American Heart Association Cannabis Users Under 50 Are 6 Times More Likely to Have a Heart Attack Cannabis Weed Effects of Cannabis FRANK Archive: Marijuana Shown to Be Less Damaging to Lungs Than Tobacco UC San Francisco
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