A California court issued a temporary restraining order preventing the state water board from enforcing "curtailment letters" it sent to four irrigation districts in the Central Valley. The letters ordered the districts and various farmers and businesses to stop diverting water from California's riv...

The D.C. Circuit upheld an EPA regulation that requires automobile manufacturers to use "commercially available" fuel when testing the emissions of new vehicles under the CAA. Several producers of E30, a fuel that contains 30% ethanol, argued that a fuel shouldn't have to be commercially available i...