What Trump’s Environmental Rollbacks Mean for Global Warming
New York TimesPresident Trump has made dismantling federal climate policies a centerpiece of his administration. The rollbacks include: Fuel-economy standards: The Trump administration changed Obama-era rules that would have required new passenger cars, SUVs and pickup trucks sold in the United States to become less polluting over time. Methane leaks from oil and gas operations: The Trump administration has also sought to revise or reverse two major Obama-era rules aimed at limiting leaks and intentional venting of methane, a powerful greenhouse gas. President Trump has also repealed and replaced the Obama-era Clean Power Plan, which aimed to push states to reduce emissions from coal-fired power plants and shift to cleaner alternatives like natural gas or renewable energy. If, for instance, former Vice President Joseph R. Biden Jr. wins the White House and swiftly moves to reinstate new rules on vehicles, methane and HFCs — or puts in place even more sweeping policies to cut emissions, as he has pledged — the effect of Mr. Trump’s changes could, in theory, be undone.