发展缘由：现代景观设计的发展历史 欧洲深厚的园林文化传统和现代工业文明蕴育了现代景观规划设计 的诞生,它的发展经历了各种风格形式和思想观念的演变。
Reason for development: the development history of modern landscape design, the profound garden cultural tradition and modern industrial civilization in Europe, has brought about the birth of modern landscape planning and design, and its development has experienced the evolution of various styles, forms and ideas.
The purpose of greening construction is not only to beautify the city and bring people a pleasant feeling, but also to create a more suitable living environment for people, which is conducive to people’s physical and mental health.
Greening can be carried out on the roof layer, roof (balcony), building facade, street, flat ground, slope, etc.
Northern China has long suffered from desertification. It needs to be afforested and planted with drought resistant plants. Beijing, Shanxi and other important provinces and cities attach great importance to roof greening. As of 2006, 230000 square meters of roof greening had been completed in six districts of Beijing, according to the data from the green space management office of the Municipal Bureau of landscape architecture and afforestation.