随着城市人口的激增和现代工业的高速发展,使环境日趋恶化,直接影响到社会经济发展和人们身体健录。为了保护城市生态环境,越来越多的人认识到森林是产生绿色生态物质的源泉,是改善城市环境的根本措施,是促进城市社会发展的重要保障。于是,许多国家开展了“城市森林”、“都市林业”、“森 With the rapid growth of the urban population and the rapid development of modern industry, the environment has deteriorated day by day, directly affecting the social and economic development and people’s health. In order to protect the urban ecological environment, more and more people realize that the forest is the source of green ecological material, is the fundamental measure to improve the urban environment, and is an important guarantee to promote the urban social development. As a result, many countries have launched ”urban forest“, ”urban forestry“, ”Sen