Clean Air Adds Months to U.S. Lives, Study Finds
By Alicia Chang, Associated Press
Http://www.freep.com
Published in the Detroit Free Press February 2009
LOS ANGELES - Cleaner air over the past two decades has added nearly five months to the average life expectancy in the United States, according to a federally-funded study.
Researchers said it is the first study to show that reduction in air pollution translates into longer lives.
Between 1978 and 2001, Americans' average life span increased almost three years to 77, and as much as 4.8 months of that can be attributed to cleaner air, researchers from Brigham Young University and Harvard School of Public Health reported in today's New England Journal of Medicine.
Some experts not connected with the study called the gain dramatic.
"it shows that our efforts as a country to control air pollution have been well worth the expense," said Dr. Joel Kaufman, a University of Washington expert on environmental health.
Scientists have long known that the grit in polluted air, or particulates, can lodge deep in the lungs and raise the risk of lung disease, heart attacks and strokes. The grit - made of dust, soot and various chemicals - comes from factories, power plants and diesel-powered vehicles.
In 1970, Congress passed a revised Clean Air Act that gave the Environmental Protection Agency the power to set and enforce national standards to protect people from particulate matter, carbon monoxide and other pollutants.
For the study, scientists used government data to track particulate pollution levels over two decades in the 51 U.S. cities studied.
They compared these changes to life expectancies calculated from death records and census data. They adjusted the results to take into account the other things that might affect life expectancy, such as smoking habits, income, education and migration.
The study was partly funded by the Centers for Disease Control and Prevention and the EPA.
You may visit http://www.Freep.com to view this article
You may visit http://www.epa.gov to find other related studies
posted by Steve & Mike @ 6:05 AM
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