Nation

Appeals court upholds EPA emissions rules

Heat-trapping factory gases, autos targeted

WASHINGTON — A federal appeals court on Tuesday upheld the first-ever regulations aimed at reducing the gases blamed for global warming, handing down perhaps the most significant decision on the issue since a 2007 Supreme Court ruling that greenhouse gases could be controlled as air pollutants.

The rules, which had been challenged by industry groups and several states, will reduce emissions of six heat-trapping gases from large industrial facilities such as factories and power plants, as well as from automobile tailpipes.

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