The battle is expected to reach the Supreme Court, which is far more conservative today than it was when the measure was established.

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The Trump administration has repealed the scientific determination that underpins the government’s legal authority to combat climate change.

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Following three of the warmest years on record, as scientists reckon with climate tipping points and states and cities grapple with the escalating cost of extreme weather and more intense wildfires, the Trump administration this week is expected to formally eliminate the US government’s role in controlling greenhouse gas pollution.

By revoking its 17-year-old scientific finding that greenhouse gases endanger public health and welfare, the Environmental Protection Agency will demolish the legal underpinning of its authority to act on climate change under the Clean Air Act.

EPA Administrator Lee Zeldin will be alongside President Donald Trump for an event Wednesday focused on boosting US use of coal, as mercury and air toxics standards are repealed. That is expected to be a prelude to Zeldin finalizing the endangerment finding repeal, an assignment the president handed him in an executive order signed on the first day of his second term in office.

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The agency is racing to repeal a scientific finding that requires it to fight global warming. Experts say the goal is to get the matter before the justices while President Trump is still in office.

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The Environmental Protection Agency has stopped estimating the dollar value of lives saved in the cost-benefit analyses for new pollution rules.

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