United Nations’ drug experts are worried that the collapse of opium production in Afghanistan will boost demand for new and dangerous alternative products around the world. The UN Office on Drugs and Crime (UNODC) in Vienna warned on Wednesday in particular against the synthetic heroin substitute nitazene, which has already led to deaths in several European countries. The cultivation of opium poppy, from which the heroin raw material opium is obtained, was banned in Afghanistan by the Taliban in 2022. As a result, global opium production fell by 74% last year to just under 2,000 tons, accordin…