when did air pollution start in mexico city
Air pollution in Mexico City 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."[1] Historic air pollution episodes of the 1950s led to acute increases in infant mortality.[2]
Air quality index Some of the key pollutant densities in Î¼g/m3 for the hourly background index, the corresponding sub-indices, and five CAQI ranges and verbal descriptions are as follows.[33]
Dust Bowl This catastrophe intensified the economic impact of the Great Depression in the region.
Buddhism in Southeast Asia
Economic nationalism While the coining of the term "
America's Next Top Model (cycle 1) First aired May 20, 2003