weed smoke vs tobacco Measuring PM2.5 concentrations from secondhand vs. marijuana in 9 rooms of a detached 2-story house Many people think cannabis smoke

Many people think cannabis smoke is harmless. Here's how how that belief can put health at risk PBS News Marijuana and tobacco are often compared as better or worse, but when it comes to lung health, smoke itself is the problem. Burning any substance releases toxic chemicals that irritate and damage Teenage Tobacco Use Drops But Marijuana Use Increases Don't smoke it with tobacco: scientists suggest ways to make cannabis safer Cannabis The Guardian

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