As national attitudes and laws around cannabis use have evolved, so have the commercially grown strains of the plant. Some marijuana varieties today contain levels of THC, the drug’s psychoactive compound, as high as 50 percent, compared to around 5 percent a generation ago. But as PBS NewsHour science correspondent Miles O’Brien reports, the effects […]
There are environmental and economic benefits to the idea, but marijuana in New Zealand is still illegal.
What’s the state of the cannabis research in this new administration?
PBS NewsHour segment