Clean air can make life extension 5 months

A new study shows that in the past 20 years, air quality, the average American life expectancy increased to nearly 5 months. This is the first proven to reduce air pollution, help to prolong the life of people.

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United States Brigham Young University and the Harvard School of Public Health researchers say, from 1978 to 2001, the average American life span extended from the previous 74 years to 77 years old, 3 years 4.8 months, thanks to improved air quality .



Environmental Health, University of WashingtonExpertsYue Aier Dr. Kaufman said: "This shows that our country to control environmental pollution is still worth the effort."



For years, scientists know, contaminated air particles can stay deep in human lungs, which will increase the Huanfei Bing, stroke and heart disease. These from the dust, soot, carbon monoxide and various chemicals formed by particles from factories, power plants and diesel-driven vehicles.



In 1970, Congress passed the Clean Air Act revisions, the bill authorizes the Environmental Protection Agency to develop and implement national standards to protect people from particulates, carbon monoxide and other pollutants. Installed in the car through the catalytic device, etc., the bill to improve the national air quality has won wide recognition.



For the study, researchers used government data, observed over the past 20 years, 51 cities in the U.S. air particulate pollution. They will these changes with the census data and death records from the calculated to compare life expectancy. They adjusted the results, and the exclusion of smoking habits, income, educational level, and moved to some other factors that may affect life expectancy.



On average, in their study of cities, the level of particulate matter per cubic meter of air from 21 micrograms to 14 micrograms. Meanwhile, the Americans extended the life of the average 2.72 years.



ResearchMain author of the report, Brigham Young University epidemiologist Arden Pope, said: "We found an average reduction of air pollution in those larger communities, people are also relatively large increases in life expectancy."

Progress in terms of clean air in Pittsburgh, the most obvious and Buffalo, New York, people are living longer nearly 10 months. The life expectancy of about 5 months of cities, including Los Angeles, Indianapolis and St. Louis.



U.S. Environmental Protection Agency, said in a statement that the study of airborne particles as they develop the standards provide important information. Environmental Protection Department, since 2000, the U.S. average concentration of particles in the air has decreased by 11%. Last year, government researchers reported that life expectancy for the first time the Americans more than 78 years of age.