Arizonans celebrate new EPA soot standards

Arizona leaders are encouraged by the U.S. Environmental Protection Agency's new soot standards they said will protect people from dangerous and deadly particle pollution. Sandy Bahr, director of the Grand Canyon chapter of the Sierra Club, said the revised standards will help reduce harmful pollution and improve air quality by lowering the standard for fine particulate matter 2.5 microns or smaller in diameter, known as PM 2.5, from 12 micrograms per cubic meter to nine micrograms per cubic meter. ...

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