And yet another study suggesting strongly that weed is very damaging and that the "it's harmless, dude" vibe that has spurred legalization is less than useful.
I'll say it again: wait for the science, and inhaling anything other than air is stupid.
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Startling Study Links Cannabis Use to Genetic Damage and Cancer
https://scitechdaily.com/startling-study-links-cannabis-use-to-genetic-damage-and-cancer/