17May/090
Marijuana potency surpasses 10 percent, U.S. says
The average potency of marijuana, which has risen steadily for three decades, has exceeded 10 percent for the first time, the U.S. government will report on Thursday.
Mahmoud ElSohly says marijuana's potency will continue to rise before tailing off in the next five years.
Mahmoud ElSohly says marijuana's potency will continue to rise before tailing off in the next five years.
Scientists working for the government predict that potency, as measured by the drug's concentration of the psychoactive ingredient THC, will continue to rise.