Cannabis resin now 25% more potent, global study reveals

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Cannabis resin – or “hash” – has increased in strength by nearly 25% over the past half century, a major international study has revealed. Researchers with the Addiction and Mental Health Group at the University of Bath analysed data from more than 80,000 cannabis street samples tested in the past 50 years in the US, UK, Netherlands, France, Denmark, Italy and New Zealand. .en.

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