Mexico City

With a population of 21.2 million people, Greater Mexico City is second-largest metropolitan area in the Western Hemisphere. The Nezahualcoyotl District is seen here. By the 1990s Mexico City had become infamous as one of the world's most polluted cities, but has improved the air quality of the city drastically since to be roughly comparable to Los Angeles.

19.407452°, -99.027845°

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