Cannabis use is increasing worldwide and evidence shows that what’s available on the market is now more potent than ever before.

That’s according to the UN Office on Drugs and Crime (UNODC) which on Friday is releasing its 2015 World Drug Report.

The study also finds that drug use in prison is much higher than in the general population, with heroin use 14 times more prevalent.

Stephanie Coutrix spoke with Angela Me from UNODC’s office in Vienna and began by asking her about the drug situation in prisons.

Duration: 3’57”