Potent Pot: Marijuana Is Stronger Now Than It Was 20 Years Ago


Potent Pot: Marijuana Is Stronger Now Than It Was 20 Years Ago
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Pot is becoming more potent, a new study suggests.

In the study, the researchers looked at more than 38,600 samples of illegal marijuana seized by the U.S. Drug Enforcement Administration over 20 years. They found that the level of THC, or tetrahydrocannabinol — marijuana’s main psychoactive ingredient — in the marijuana samples rose from about 4 percent in 1995 to about 12 percent in 2014.

Conversely,

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