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绿化是栽种植物以改善环境的活动。如今我们的生态环境受到极大的破坏、温室效应、大气污染等严重威胁着人们的健康。随着城市化进程的加快,人们需要一个宜居的环境,城市绿化是改善人们生活环境的一个重要手段。“让绿色环抱城市,使城市充满绿色”是大家共同的愿望。而公路绿化作为城市绿地系统的重要组成部分,不仅具有调节公路小气候、减弱噪音、净化空气等作用,还起到串联其他各类绿地,展示城市景观面貌的作用,是体现城市文明程度的重要
Greening is the activity of planting plants to improve the environment. Today, our ecological environment has been greatly damaged, and the greenhouse effect and air pollution threaten people's health. With the acceleration of urbanization, people need a livable environment, and urban greening is an important means to improve people's living environment. “Let the green encircle the city and make the city full of green ” is our common wish. As an important part of urban green space system, highway greening plays an important role not only in regulating the microclimate of roads, reducing noise and purifying air, but also in tandem with other types of green spaces to show the appearance of urban landscapes. It is also important to reflect the degree of urban civilization