Ever Wonder How They Test Marijuana For Safety? (VIDEO)

As marijuana goes mainstream in the U.S., people are asking new questions about weed. What makes some marijuana especially potent, for example, and how can marijuana be regulated to make sure legal weed doesn't send them on a bad trip?

For answers to those and other burning questions about the chemistry of cannabis, have a look at the new video (above) issued by the American Chemistry Society as part of its Reactions You Tube channel. The video explains how marijuana's active ingredient, tetrahydrocannabinol (THC), affects the brain, and how the marijuana-testing labs now springing up across the country test pot for safety and quality control.

To learn all the tricks of the trade in marijuana labs, check out the video.

50: Snoop Lion
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47: Rihanna
46: Hugh Hefner
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44: Bryan Cranston
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43: Robert Downey Jr
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40: Phil Jackson
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In 1975 he wrote “Maverick,” a memoir about his days playing in the NBA. Among other things, Jackson spoke frankly about marijuana use. -- Salon
39: Sarah Palin
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38: Justin Bieber
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"Bieber both confirmed that he'd been caught smoking weed and apologized for it." -- Huffington Post
34: Conan O'Brien
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30: Seth MacFarlane
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29: Martha Stewart
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20: Lady Gaga
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19: Michael Bloomberg
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15: Sanjay Gupta
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13: Andrew Cuomo
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6: Jon Stewart
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3: Bill Clinton