A lot of trees are dying in Africa\'s Sahel region and new study says climate change caused by humans is to blame. What\'s more, many tree species are also disappearing. The study appears in the Journal of Arid Environments. Climate change scientist Patrick Gonzalez led the research on six countries. At the time of the study, Gonzalez was a visiting scholar at the Center for Forestry at the University of California at Berkley.在非洲撒海尔地区有许多的树都处于垂死边缘且新的研究指出对此人类造成的气候变化应负主要的责任。此外，很多的树种也慢慢消失了。这个研究被发表在干旱环境杂志上，研究气候变化的科学家Patrick Gonzalez在六个国家引导了此次调查研究。研究期间，Gonzalez是加州大学伯克利分校林业中心的访问学者。 ___________________________. And the Sahel has experienced the most severe drought in the world in the modern rainfall measurement record.\"据现代降雨量测量记录记载，撒海尔地区发生过世界最严重的旱灾。”
