从某种意义上说，20世纪乃是全球性环境危机的世纪。人类文明与自然环境矛盾的空前尖锐，使人类的生存与发展问题成为当代世界最普遍的困惑。环境的急剧恶化成为可持续发展现得以产生的重要前提。时至今日，可持续发展现已深入人心。人们普遍意识到；倘若不解决环境问题，可持 In a sense, the 20th century is a century of global environmental crisis. The unprecedented contradiction between human civilization and the natural environment has made the issue of human existence and development the most common confusion in the contemporary world. The rapid deterioration of the environment has become an important prerequisite for sustainable development. Today, sustainable development is now well-established. People are generally aware of it; if it does not solve the environmental problems, it is sustainable