California will regulate the emissions of sulfur hexafluoride (SF6) from electric utility equipment starting in 2011, reports the New York Times. SF6 is used to insulate switches typically found in high-voltage transmission systems, which accounts for

about 80 percent of California’s total SF6 emissions. “Although it is only used in small amounts, sulfur hexafluoride is the

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California to Regulate Potent GHG Emitted By Utility Equipment