The THC concentration in marijuana plants has increased threefold between 1995 and 2014, according to a surgeon general report. Concentrated products can contain up to 75% THC. "This ain't your mother's marijuana," said U.S. Surgeon General Jerome Adams.

The THC concentration in marijuana plants has increased threefold between 1995 and 2014, according to a surgeon general report.

Concentrated products can contain up to 75% THC.

"This ain't your mother's marijuana," said U.S. Surgeon General Jerome Adams.https://t.co/AhmwRqaPRJ

— NPR (@NPR) August 30, 2019