科学美国人60秒 SSS 2014-2-11（在线收听）

 The drug trade has devastated communities in central and south America. Policy makes are looing at moving away from trying to stop drug production to trying to curb demand. If it works and Nakada producers lose power, central american's forest will benefit along with its people.That's according to a new policy report in journal  science. It turns out that growth of cocane business has lead to ,in  central america, what's called .naco deforestation. The practice takes place in ecologically sensitive , even protected areas. Poverty, weak goverments and illegal logging all affect forest use. But central america has become an important bridge between the US and south america's cocane. Forests have been slashed for roads  and plain landings. And when local trenchers or  timber sellers become rich with drug money, they expand their operations. Nakada producers also develop habitat for legal agriculture that's used to laundry  drug money. Goverment agencies are bribed to turn away and conservationist groups  fear entering this area. The study author said that the ecological and conservation impacts of the drug traders are underappreciated and they shouldn't form but  conservation anddrug policy in the future.