California emissions standards ruling [EPA] News
California emissions standards ruling [EPA]

California State Motor Vehicle Pollution Control Standards; Notice of Decision Granting a Waiver of Clean Air Act Preemption for California's 2009 and Subsequent Model Year Greenhouse Gas Emission Standards for New Motor Vehicles, Environmental Protection Agency, June 30, 2009 [granting permission to California to enforce its own greenhouse gas emissions standards].

Reported in JURIST's Paper Chase here. Latest commentary available here. JURIST has more on actions taken by the Environmental Protection Agency.