Alexa Lardieri, U.S. News and World Report, March 20, 2018

Exposure to marijuana smoke is three times more harmful than exposure to tobacco smoke, new research suggests.

Matthew Springer, a professor at University of California, San Francisco School of Medicine, studied the effects of smoke on rats and found exposure to secondhand marijuana smoke makes it harder for arteries to expand and allow a healthy flow of blood.

The rise of e-cigarettes and vaping devices also worries him. Although they may seem like good alternatives to avoid inhaling smoke and producing secondhand smoke, Springer warns they could contain harmful chemicals of their own. He is currently researching the health effects of those chemicals as well.

Source: https://www.usnews.com/news/health-care-news/articles/2018-03-20/study-marijuana-smoke-3-times-worse-for-you-than-tobacco-smoke

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