Sunlight bounces off the light-colored surface, so it stays cool on hot days. Densely built areas of cities trap heat. This is known as the urban heat-island effect. The Green Alley program also uses recycled materials. And it uses energy-saving streetlights. These direct light downward to reduce light pollution at night.
陽光反射淡色的表面，所以它在炎熱的天氣里可以保持涼爽。城市裡的建築面積變熱。這就是城市熱效應。綠色小徑項目也使用回收材料。並且用節能路燈。這些直接向下的光可以減少晚上的光污染。
Research for the project began in two thousand four. No businesses own any patents on the materials used in the Green Alley program.
該項目的研究開始於2004年。沒有商家擁有綠色小徑項目中材料的專利。
Not all Chicago alleys need replacing. Program head Janet Attarian says sixty-two alleys will have been renewed or rebuilt by the end of this year. City officials are also starting to use the environmentally friendly technologies for parking areas and low-traffic roads.
不是所有的芝加哥小徑都需要換掉。項目負責人Janet Attarian表示有62條小徑將在年底重新改造或重建。城市官員也開始使用對環境有利的技術在停車場和低交通量的馬路。
Permeable pavement is not very good for roads with a lot of traffic. Too much weight and travel over the material can damage it. Within six months of pouring Chicago's first permeable concrete alley, the cost of the new concrete had dropped more than sixty percent.
可滲透的路面對交通量馬路不是很有用。太多的重量和行駛在這些材料上會破壞它們。在灌注芝加哥的第一條可滲透混凝土小徑的6個月內，新混凝土的花費已經減少了60%。
Chicago has "more miles of alleyways than any other city in the world," says Mayor Richard M. Daley in the Green Alley Handbook.芝加哥市長Richard M. Daley在綠色小徑手冊上提到“芝加哥有比世界上任何一個城市都長的小徑。”
posted on 2008-07-22 06:52
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