Study: Cleaner air adds 5 months to US life span

A new study by researchers at Brigham Young University and Harvard School of Public Health shows that average life expectancy in 51 U.S. cities increased nearly three years over recent decades, and approximately five months of that increase came thanks to cleaner air.

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<p><a href="http://www.physorg.com/news151780986.html">Study: Cleaner air adds 5 months to US life span</a></p> <p>A new study by researchers at Brigham Young University and Harvard School of Public Health shows that average life expectancy in 51 U.S. cities increased nearly three years over recent decades, and approximately five months of that increase came thanks to cleaner air.</p>