EPA Authority Over Power Sector’s Climate Impacts Heads to Court

One of the Trump administration’s biggest environmental rollbacks goes under the microscope Thursday, with federal judges set to hear arguments on the replacement of the Obama-era Clean Power Plan.

The U.S. Court of Appeals for the District of Columbia Circuit will weigh whether the Environmental Protection Agency violated the law when it scrapped the sweeping plan to cut greenhouse gas emissions from the power sector and adopted the narrower, industry-friendly Affordable Clean Energy rule.

The outcome could affect future administrations’ ability to address the planet-warming impacts of the power sector, the nation’s second-biggest source of greenhouse gases ...