Asked by Justin

mexico city is surrounded by mountains. what effect has this had on the air quality in this city?
Answered by Ms. Sue
Check the last sentence in the fifth paragraph.

http://encarta.msn.com/encyclopedia_761569238/mexico_city.html

This site may also help you.

http://visibleearth.nasa.gov/view_rec.php?id=3419

Answered by Yasmen
Because I wanted the effect of it
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