THE GAVEL DROPS ON AIR.

The article reports on the five-four decision of the U.S. Supreme Court to reject a position of the President George W. Bush Administration. It states that greenhouse gas emissions did not constitute pollutants as defined in the Clean Air Act. The Supreme Court decided motor-vehicle emissions make a "meaningful contribution to greenhouse gas concentrations" and to global warming. Moreover, the court ordered the Environmental Protection Agency (EPA) to reevaluate its contention that has the discretion not to regulate greenhouse gas emissions.