古柯叶：罪恶之源还是生命之花 玻利维亚地区“圣草”“绿色金子” Erythroxylon coca bush's leaves yield the highest amounts of cocaine,approximately 1% by weight.1 However,cocaine is found in all parts of the coca plant.Because the amount of cocaine present in the harvested leaves decreases over time,the leaves are typically processed into cocaine paste and/or powder as soon as possible. 每年500-800吨流向世界