http://www.bbc.co.uk/news/world-south-asia-15254788
Opium production in Afghanistan rose by 61% this year compared with 2010, according to a UN report.
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Afghanistan produces 90% of the world's opium - 5,800 tonnes this year - the main ingredient of heroin.
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The per-hectare price of opium more than doubled to $10,700 (£6852) from $4,900 (£3137), according to the report.
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