The First Circuit amended a previous ruling vacating an air permit issued by the Massachusetts Department of Environmental Protection (MDEP) for a proposed natural gas compressor station that is part of a pipeline connecting the northeastern United States and Canada. The court had found that MDEP fa...

The Third Circuit granted a petition to review EPA's approval of Pennsylvania's proposed NAAQS for ozone. An environmental group argued the standards wrongly claimed to reduce pollution output at the state's most advanced coal-burning power plants while "simply rubberstamping an average of current p...

A district court granted summary judgment for conservation groups in a lawsuit alleging that the Army Corps of Engineers' continued operation and maintenance of a flood control project in the Pacific Northwest violated the ESA. The groups argued the Corps was violating §7(a)(2) by operating and mai...