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Climate Change Suit Against Utilities Rejected by Top Court

States can’t invoke federal law to force utilities to cut greenhouse-gas emissions, the U.S. Supreme Court ruled, shutting off one avenue for groups that advocate bolder steps against climate change.

The unanimous ruling is a victory for five companies -- American Electric Power Co., Duke Energy Corp., Xcel Energy Inc., Southern Co. and the government-owned Tennessee Valley Authority -- that had been sued by six U.S. states, including California, and the city of New York.