The UN doesn’t understand the British system of governance:
Britain has one of highest number of users of “legal highs” in Europe, a report from the UN office on Drugs and Crime (UNODC) has warned.
The “unprecedented” spread of so-called legal highs has left doctors and nurses in Britain “powerless” to treat drug users who are unable to identify what substances they have taken.
Because, y’know, they’re legal. In our system anything that is not expressly illegal is legal. There’s no law against snorting onion rinds. Thus snorting onion rinds is legal.