哥伦比亚古柯种植减少25%
The area of land planted with coca in Colombia has fallen by 25%, a UN report has said.
一份联合国报告显示，哥伦比亚的古柯种植区域减少了25%。
The land under coca cultivation is now about a third of that in 2001, says the UN Office on Drugs and Crime (UNODC).
While coca areas fell nationwide, they rose in three provinces plagued by rebels and drug gangs.
Colombia is one the world's top three cocaine producers and has made the war on drugs one of its main priorities.
The annual report by the UN's Integrated Illicit Crops Monitoring System says that the land planted with coca bushes has dropped from 64,000 hectares in 2011 to 48,000 hectares in 2012, the lowest figure since monitoring started in Colombia more than a decade ago.
Analysts say the fall in coca production suggests illegal groups which have so far financed themselves through drug trafficking may increasingly be moving into illegal gold and emerald mining, both of which have been increasing in Colombia.
The groups take advantage of the fact that, unlike coca or cocaine, gold and emeralds（绿宝石，翡翠） are legal to transport and sell.