Afghanistan opium: Record yield from poppy fields
13 November 2013 Last updated at 15:39 GMT
Afghan opium cultivation has reached record levels, with more than 200,000 hectares planted with the poppy, according to the United Nations.
An increase of 36% in the past year means supply now outstrips demand despite efforts to stamp out its harvesting.
David Loyn reports from the border between Afghanistan and Iran.