Environmentalists Threaten Suit Over EPA Failure To Implement SO2 Limit

The Center for Biological Diversity (CBD) and Sierra Club are threatening to sue EPA for failing to implement its 2010 federal air quality standards for sulfur dioxide (SO2), charging that the agency has failed to ensure 11 states have plans in place for attaining the limits. In a Dec. 20 letter to EPA, the groups announce their intent to sue over EPA’s failure to ensure that state implementation plans (SIPs) are in place that are required to meet the primary,...