A state high court affirmed a lower court's summary judgment for the Montana Department of Environmental Quality in a challenge to the Department's issuance of a NPDES general permit for discharges from municipal separate storm sewer systems (MS4s). An environmental group challenged the permit, argu...

The D.C. Circuit granted hydrofluorocarbon (HFC) manufacturers' petitions to review a 2016 EPA rule that rendered certain HFCs unacceptable for various uses in aerosols, motor vehicle air conditioners, commercial refrigerators, and foams. The court found that it was bound by a previous ruling that s...