The Trump administration calls its climate change policy shift the ‘largest deregulatory action’ in history—but experts say the impact will be limited

The Trump administration is framing its decision to repeal the landmark legal finding that’s used for the regulation of greenhouse gas emissions—for everything from automobiles to power plants—as the “largest deregulatory action in American history.” And it is indeed a sizable policy shift—but the practical implications won’t change much for the shorter-term operations of the energy and auto sectors, legal experts and industry analysts from across the ideological spectrum said.

While...