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Decreasing air pollution helps raise life expectancy in United States

Researchers at the Harvard School of Public Health recently discovered a significant connection between the declining air pollution rates in the United States and the rising average life expectancy among the country's citizens. According to News-Medical, the research team found that there have been substantial reductions in air pollution over the past 10 years, which have helped improve life expectancy figures in many areas. However, Andrew Correia, a researcher with the Harvard School of Public Health, cautions that optimum air quality levels have not yet been reached.

"The U.S. population as a whole is exposed to much lower levels of air pollution than 30 years ago...it appears that further reductions in air pollution levels would continue to benefit public health," Correia told the news source.

Correia and other researchers collected data between 2000 and 2007 for their evaluation. Group members calculated the mean life expectancy change during this time frame in 545 U.S. counties, and also considered potential variables such as the number of residents who smoked and the socioeconomic status of citizens in these regions.

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