Colorado published its 3rd report on the Impact of Marijuana in Colorado. Colorado opened commercial marijuana stores in January, 2014. That year also saw the following, according to the report:
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a 29% increase in the number of marijuana-related emergency room visits,
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a 38% percent increase in the number of marijuana-related hospitalizations,
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30 injuries from THC extraction labs (also called BHO labs or hash oil explosions), compared to 18 in 2013