Across the planet, legendary brown-cloud metropolises, such as Mexico City, Los Angeles and New Delhi, have been grappling with the issue with varying degrees of success.

全球都有传说中的黑雾之都，比如墨西哥，洛杉矶，新德里，应对这个课题，都取得了不同程度的成功。

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The approach is called bus rapid transit, or BRT, and it has already proven itself in some Latin American megacities, such as Bogota and Mexico City.

这种办法就是快速公交运输系统，或者BRT，这种系统已经在拉丁美洲的一些超大城市比如波哥大，墨西哥城的运行中收到显著成效。

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In a few occasions there has been an explosion of enthusiasm such as the one we experienced last Thursday night with the Mexico City Philharmonic Orchestra at the West Berlin Philharmonic.

很少有像这样激情迸发的时刻，正如上个星期四在西柏林爱乐乐团，我们与墨西哥城爱乐乐团一起度过的那个晚上一样。

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Complimentary food will still be offered on flights to business destinations such as Mexico City, Mexico.

CNN: Continental cuts back on free food

Monuments, such as Mexico city's lavish anthropology museum, were built in their honour, and artists like Diego Rivera glorified Indian history in their government-commissioned murals.

ECONOMIST: The Mexicans treated as aliens in their own country

It is an idea that has spread to cities around the world, such as Ottawa, Mexico City and Paris, but it started in Colombia when the streets were handed over to cyclists on a Sunday in the mid-1970s to encourage cycling in a safe environment.

BBC: Reclaiming the streets in Bogota