Poppy cultivation in Afghanistan is expected to soar by 59% this year, providing 92% of the world\'s supply of opium, the United Nations says. The UN Office on Drugs and Crime predicted a 6,100-tonne harvest of opium, with much of the rise coming in Taleban strongholds in the south. The US is the main backer of a huge drive to rid Afghanistan of opium. But a top US drugs official warned on Saturday Afghanistan could be \"taken down by this whole drug problem\". The $2.7bn drugs trade accounts for about a third of Afghanistan\'s economy. (BBC)