Scientists
believe that the continuous decline in air pollution is associated with
increased life span for people especially in rural areas.
According
to a recent study in the United States, air pollution continues to
decline between 2000 and 2007, although not at the same rates as that
recorded in the 1980s. Despite this slow decline in the level of air pollution but it kept pace with the increase in life span.
Used
the study, recently published in the journal Epidemiology, statements
of 545 counties across the country, both urban and rural, the average
decline in micro pollutants in eight years by 1.56 µg per cubic meters. In contrast, increased life expectancy rate of 0.84 in.
Of
course there are several other factors contribute to the increase in
the rates of increase in ages between individuals by clean air. The
researchers took into account other factors such as declining smoking
rates and per capita income and some other economic and health factors. Scientists have estimated that 18% of the increase in the life span of a person comes as a result of reduced air pollution.
Study
author commented Dr. Francesca Dominic, Professor, school of public
health at Harvard University, said: "this study emphasizes that even if
we could reduce air pollution by fine particles slow rates, even if we
have some effort to purify the air, the continuation of this work
remains especially important after this study demonstrated the added
benefit of improved air quality on public health."
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