Over the past five years the average purity of cocaine has gone up from 18% to 51%

These are high times for discerning drug users. For years they made do with poor quality drugs. But now the purity of cocaine, ecstasy and heroin is rising across Britain. Over the past five years the average purity of cocaine has gone up from 18% to 51%. In parts of the country police have seen cocaine that is 90% pure of late. Why?http://econ.st/1S2gn9m

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