How safe is super-concentrated marijuana? | PBS NewsHour

JUDY WOODRUFF:  With recreational marijuana now legal in eight states, a serious health and safety question about the potency of the psychoactive drug in cannabis, known as THC, are emerging.  In Colorado, some marijuana products contain 90 percent pure THC, with little research documenting the physical and mental effects on consumers.

This week, the state’s health department announced more than $2 million in grants to study the impacts on driving and cognitive functioning.

As John Ferrugia of Rocky Mountain PBS in Denver reports, there are concerns that the effects on some users could be deadly.

MARC BULLARD:  2016 is a year of something new.

JOHN FERRUGIA:  In December 2015, Marc Bullard felt on top of the world.  He had landed a good job in Denver after graduating magna cum laude from Southern Methodist University.

MARC BULLARD:  It’s been a good year.

JOHN FERRUGIA: He made video diaries to keep his family and friends

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