Columbia Energy Exchange

The climate policy landscape in the US is in flux. Last month, the Environmental Protection Agency repealed its own power to regulate greenhouse gases. Two weeks later, the Supreme Court said it will hear a case which the city of Boulder, Colorado, brought against the oil companies ExxonMobil and Suncor that could determine the fate of lawsuits brought by cities and states against fossil fuel companies over damages from climate change.  Since its adoption in 2009, EPA's endangerment finding — which says that greenhouse gases harm public health and welfare — had formed the legal foundation for major federal climate regulations. In announcing its rescission, EPA Administrator Lee Zeldin called it the largest single deregulatory event in US history. But the repeal may be held up in courts for years, and it's just one piece of a complicated regulatory puzzle.  Petitions for review challenging the EPA's rescission of the endangerment finding are due in just over a month. So how might these major policy swings play