最近国外出现了以“绿色未来”为基础的城市森林化学派。他们的学说风靡全球,现已为越来越多的人所接受。建立绿色的城市,各国的大城市都把森林绿地视为“肺”和“肾”,努力扩大绿化面积。华沙经过20年的努力,在近郊造林100万亩,城市中心林木繁茂,公共绿地人均77.7平方米,居世 Recently, there emerged a school of urban forest chemists based on a “green future.” Their theories have swept the world and are now accepted by more and more people. To establish a green city, all the big cities in the world regard the forest green space as “lung” and “kidney” and strive to expand the green area. After 20 years of hard work, Warsaw has built 1 million mu of trees in the outskirts of the city. The city center is lush with 77.7 square meters of public green space per person