“Cannabis decriminalisation measures across the United States, including the medical use of marijuana in California, have been sharply criticised by the United Nations, which has warned Washington they violate the international drug conventions. The International Narcotics Control Board (INCB), which polices the drug treaties, has also warned about the growing public health threat from the ‘unprecedented surge’ in ‘legal highs’ and called for concerted global action to curb the growing trade.”
