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What to know about Senate's effort to block vehicle-emission rules in California

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The U.S. Senate is moving forward with an effort to block California 's nation-leading standards for vehicle emissions.

The Republican -controlled Congress is targeting three California waivers that set stricter emissions rules than the federal government.

California makes up roughly 11% of the market, giving it significant power to shape purchasing trends.

The National Automobile Dealers Association urged the Senate to pass the measure.

Eleven other states, plus Washington , D.C. , have adopted California 's plan to phase out new gas-powered cars.

But some of those states are already backing away.

Vermont Gov. Phil Scott last week paused enforcement of electric vehicle sales targets that follow California 's, saying the pace wasn't realistic.