近几十年来,不少国家很注意工厂的绿化,许多工厂面貌一新。譬如日本,五十年代中期,工业区空地率平均只有2.6％,很多地方没有公共绿地。1965年政府规定工业区绿地率必须达到10％。从六十年代以来,环境对策更成为工业开发建设中的主要问题之一,绿化已成为工厂建设中不可缺少的项目。1974年日本政府制定的《绿地法》要求:“具有一定规模的所有新设工厂, In recent decades, many countries have paid great attention to the greening of factories. Many factories have a new look. For example, in Japan, in the mid-1950s, the average open space rate in industrial areas was only 2.6%, and there were no public green areas in many places. In 1965, the government stipulated that the rate of green space in industrial zones must reach 10%. Since the 1960s, environmental measures have become one of the major problems in industrial development. Greening has become an indispensable item in plant construction. In 1974, the “Greenland Law” formulated by the Japanese government required: “All new factories with a certain scale,