OAKLAND, Calif.—(ENEWSPF)–April 28, 2016. Conservation and public-health groups today filed a formal notice of intent to sue the Environmental Protection Agency because the agency has failed to update air-pollution thresholds for sulfur and nitrogen. Standards for the dangerous air pollutants known as sulfur oxides and nitrogen oxides must be reviewed and updated every five years in order to account for the latest research on their threats to public health and the environment.
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