You could do a whole college module on the complex global economics, paradoxical impact of drug prohibition legislation and changing patterns of drug consumption in the US have made cocaine so much more popular, cheaper and purer in the UK – also, inevitably, leading to more deaths. Or you could invest just two minutes and 34 seconds in watching this terrific video from the Economist:  

Cocaine in Britain has become more plentiful—and more potent pic.twitter.com/lwymGkrWzb

— The Economist (@TheEconomist) September 22, 2018