The Third Circuit upheld a lower court decision dismissing, on standing grounds, a doctor's claim challenging the constitutionality of a Pennsylvania law that limits a doctor's ability to obtain information about the mixture of chemical fluids used during hydraulic fracturing when treating patients ...

An Arizona court overturned the state's issuance of an air permit for a proposed open-pit copper mine. An environmental group argued that the state's approval of the permit was arbitrary and capricious because the mine has the potential to violate NAAQS. They also claimed that the mine's modeling re...

The Ninth Circuit denied an environmental group's petition challenging EPA's approval of a revision to California's SIP. The revision provided alternative "not less stringent" controls to what is required in CAA §185's antibacksliding measures, which require that major stationary sources of polluti...