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环境问题是当今世界人们十分关注的大问题，从联合国的会议大厅到平头百姓的街谈巷议，环境保护都是热门话题之一。刚刚过去的２０世纪，在人类文明史上创造了辉煌的成就，工业文明与科学技术高歌猛进。人们在享受物质文明成果的同时，也陷入了深深的烦恼，那就是环境的恶化：
Environmental issues are a major concern for people in the world today. From the UN conference hall to the talks of ordinary people, environmental protection is one of the hot topics. In the past 20th century, brilliant achievements have been made in the history of human civilization, and industrial civilization and science and technology have made great achievements. While enjoying the fruits of material civilization, people are also deeply troubled by the deterioration of the environment: