The two cities have a similar number of residents, but Atlanta’s transport-related carbon-dioxide emissions exceed Barcelona’s by a factor of six. A key reason for this is urban sprawl: with a built-up area nearly 12 times larger than Barcelona, Atlanta implicitly encourages widespread private-vehicle use, boosting emissions, congestion, and air pollution.
亚特兰大和巴塞罗那间的区别就是例子。这两座城市居民人数相近，但亚特兰大与交通运输相关的二氧化碳排放量超过了巴塞罗那的六倍。其中的关键原因是城市扩张：因为建筑面积比巴塞罗那大近12倍，亚特兰大暗中鼓励私人轿车的广泛使用，从而加剧了排放、交通拥堵和空气污染等问题。