washingtonpost.com – Preliminary research presented at the American Heart Association’s Scientific Sessions 2014, which shows that breathing secondhand marijuana smoke might damage your heart and blood vessels as much as secondhand cigarette smoke, could impact the trajectory of what, until now, has been primarily a grassroots marijuana industry. The AHA findings may not significantly curtail the enormous momentum that the marijuana legalization movement now has nationwide — where Alaska, Oregon and Washington, D.

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