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EPA Ozone-Pollution Standard Left Intact by High Court

The U.S. Supreme Court left intact ozone-pollution standards crafted under former President George W. Bush, rejecting an appeal by a business group that said the rules were too stringent.

The rebuff leaves intact a federal appeals court decision that said the Environmental Protection Agency had adequate scientific evidence to tighten the standards for ozone, an oxidant that is the principal component of smog.