_________________________________________ The scientists say the majority of, what are known as, Carbon Offsetting Projects, don't produce real cuts in emissions. Instead, the study concludes that the system can result in perverse incentives to increase production of industrial waste gases. The last known Ebola patient in Sierra Leone has been released from hospital. The World Health Organization said no new cases had been reported in the country for more than two weeks. Almost 4,000 people have died of Ebola in Sierra Leone. BBC News. __________________________________________科学家表示被称作碳抵偿的大部分项目并没有切实的减少碳排放.相反,研究发现它们起到了反作用增加了工业废气的产生. 塞拉利昂最后一名感染埃博拉病毒的病患日前出院.世界卫生组织宣布该国已经连续二周多没有新的病例出现.塞拉利昂近4000人因感染埃博拉病毒死亡.BBC新闻.