Why Weed Is A Lot Stronger Today

The marijuana that is around today is a lot stronger than it was a few decades ago. What changed since then?

Read More:
What is THC?
http://www.livescience.com/24553-what...
“THC, or tetrahydrocannabinol, is the chemical responsible for most of marijuana's psychological effects. It acts much like the cannabinoid chemicals made naturally by the body, according to the National Institute on Drug Abuse (NIDA).”

Everyone Says Pot Is More Potent Now Than 30 Years Ago… But Is It?
http://www.vocativ.com/underworld/dru...
“Conventional wisdom among the media and potheads would have it that weed is way stronger than it was a generation ago.”

Marijuana Science: Why Today's Pot Packs a Bigger Punch
http://www.livescience.com/50220-mari...
“The marijuana that is available today may be much more potent than marijuana cultivated in the past, according to the results of new tests.”
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