Thread: Ask the Mexican
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Old Sep 13th, 2012, 01:48 AM       
It has been said that "Mexico City’s air has gone from among the world’s cleanest to among the dirtiest in the span of a generation."[4] Historic air pollution episodes of the 1950s led to acute increases in infant mortality.[5] Connections have also been found between air pollution and school absenteeism among children in Mexico City,[6] between air pollution and heart rate variability among the elderly in Mexico City,[7] and between urban air pollutants on emergency visits for childhood asthma in Mexico City.[8]
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