West Coast states are asking federal energy regulators to retract their approval of a natural gas pipeline expansion, arguing their climate laws should block projects that increase the interstate flow of fossil fuels.

Natural gas (copy)

Washington, Oregon and California are petitioning the Federal Energy Regulatory Commission to retract approval of a natural gas pipeline expansion, citing state climate laws.

Oregon, Washington and California complain the Federal Energy Regulatory Commission slighted their legal commitments to slash greenhouse gases. A FERC report called Washington's emission-reduction law a "goal."

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