Washington Post: A federal appeals court yesterday threw out a major component of the Bush administration’s effort to reduce unhealthy levels of soot and smog in Eastern and Midwestern states, a decision that environmental groups worry will delay action on air pollution well into the next administration. A three-judge panel of the U.S. Court of Appeals for the D.C. Circuit ruled unanimously that the Environmental Protection Agency overstepped its authority in instituting a rule that would have …