The Clean Power Plan had set carbon emission limits for power plants, but the U.S. Supreme Court stayed it, pending legal challenges.

Further, the order reverses Obama administration guidance on how agencies should address climate change in National Environmental Policy Act reviews. It removes the requirement to include the social cost of carbon estimates in cost-and-benefit analyses for regulations.

In addition, it lifts a moratorium on leasing coal on federal lands and undoes Obama’s climate action plan and climate-change executive orders on adaptation and national security. The official says the Trump administration believes all those Obama actions exceeded federal legal requirements and hindered economic growth.