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20年来,我国城市的发展突飞猛进。80年代以前,全国大、中、小型城市不足300座,到80年代末已发展到460多座,现在我国城市数量已达600多座。随着经济的持续发展,城市建设依然呈现迅猛上升势态,不仅数量急剐增多,而且规模也日益扩大。我国城市发展的突出特征,集中地表现在建筑层次的逐步增高和建筑密度的不断加大。因此,城市中维持生命的绿色正在受到排挤而离我们越来越远。据有关资料,我国城市的平均绿化覆盖率有17％,达20％的城市仅89座,占全国城市总数的15％弱,迄今尚无一座城市的绿
In the past 20 years, the development of our cities has been advancing by leaps and bounds. Before the 1980s, the number of large, medium and small-sized cities in the country was less than 300, reaching more than 460 by the late 1980s. At present, the number of cities in our country has reached over 600. As the economy continues to develop, urban construction is still showing a rapid upward trend. Not only the number is rapidly increasing, but the scale is also expanding day by day. The prominent features of urban development in our country are concentrated in the gradual increase of the building level and the continuous increase of the building density. As a result, the green in the city that sustains life is being squeezed away from us. According to relevant information, the average green coverage rate of our cities is 17%, while that of cities with 20% coverage is only 89, accounting for 15% of the total number of cities in the country. We have no green