Innovation In New Phychoactive Substances Represents Challenge for Drug control

UN:  "Legal Highs" Swamp Global Drug Market by Selah Hennessy.  Voice Of America.  June 26, 2013.

(1)  The regulation of the designer drug market is difficult to manage because ___________________.

(2)  The number of new phycoactive substances reported to the U.N.  Office on Drugs and Crime rose from _________________ for a ______ percent rise.

(3)  The market for cannabis and cocaine is _____________ while heroin use seems to be __________ in Europe.