In the late 1960’s, many people in North America turned their attention to environmental problems, and new steel-and-glass skyscrapers were widely criticized.Ecologists pointed out that a cluster of tall buildings in a city often overburdens public transportation and parking lot capacities.
60年代后期，許多北美人把注意力轉(zhuǎn)向了環(huán)境問題，那些嶄新的玻璃鋼摩天大樓受到了廣泛的批評。生態(tài)學(xué)家指出，城市中密集的高層建筑經(jīng)常給公共交通與停車場的承載能力造成過重的負(fù)擔(dān)。
