Poor quality of air in the capital and largest city of Mexico
Air Pollution in Mexico City has been of concern to the city's population and health officials for decades. In the 20th century, Mexico City's population rapidly increased as industrialization brought thousands of migrants from all over the world.[1] Such a rapid and unexpected growth led to the UN declaring Mexico City as the most polluted city in the world in 1992. This was partly due to Mexico City's high altitude (7382 ft above sea level), which causes its oxygen levels to be 25% lower. Carbon-based fuels also do not combust completely. Other factors include the proliferation of vehicles, rapid industrial growth, and the population boom. The Mexican government has several active plans to reduce emission levels which require citizen participation, vehicular restrictions, increase of green areas, and expanded bicycle accessibility.
Air pollution causes about one in seventeen (5.9%) of all deaths in the country. It is the eighth largest cause of death, after factors such as diet, overweight, high blood pressure, alcohol and drugs, smoking and lack of exercise.
The air pollution of the Mexico City Metropolitan Area, contained within the Valley of Mexico, is measured by the Índice Metropolitano de la Calidad del Aire (Metropolitan Index of Air Quality).
^"Air Quality, Weather and Climate in Mexico City". Bulletin. Retrieved 9 June 2009.
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