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3. You might have heard about the smog.They're working on it
你可能已經聽說了墨西哥城的大霧。他們已經在著手解決了
Pollutionin Mexico City used to be so bad that children painting pictures of the skyreportedly would color it gray, not blue. Because of its geographic location -- in avalley between mountains -- and the sheer number of cars traveling its streets,smog is a problem the city is still battling. But with government programs thatencourage bike-riding and limit the number of days motorists can take to thestreets, longtime residents say the pollution problem is much better than itused to be. Another innovative solution debuted lastyear: a hospital tower covered with a facade designed to "eatsmog," breaking down pollutants when the sun hits it. Designers saythe tiles on the facade of the Manuel Gea Gonzalez Hospital neutralize theeffects of 1,000 cars every day.
墨西哥城以往的污染特別嚴重，據說孩子們在給天空畫畫時會把天空描繪成灰色的，而不是藍色的。
這主要歸咎于其地理位置，位于兩座山脈間的山谷里，城里有大量的汽車，霧霾依然是個嚴重的問題。政府采取了一些措施鼓勵人們騎自行車，并且限制汽車可出行的天數，所以長期居住在這里的居民說現在空氣比以往好多了。去年又頒發了一個新的措施：在一座醫院大樓外面覆蓋上一層立面，這種立面可“吸食霧霾”，當太陽照射在上面時就可以把污染物分解。設計者說立面上的瓷磚每天可以中和1000輛汽車的尾氣。
