In early February, the EPA repealed the 2009 Greenhouse Gas Endangerment Finding, a landmark regulatory move reversing the determination that greenhouse gases threaten public health. Pat Parenteau, emeritus professor at Vermont Law and Graduate School and former EPA regional counsel under President Ronald Reagan, explains what happens next, including the many challenges the Trump administration is facing from environmental groups, and how the repeal could impact both health and climate change.

Photo: [Smog obscures view of Chrysler Building from Empire State Building, New York City] / World-Telegram photo by Walter Albertin.