The Trump administration is seeking to overhaul the way it calculates the costs and benefits of environmental regulation, a move that could make it harder to justify air pollution curbs.
The Environmental Protection Agency is set to formalise the new approach, said two people familiar with the matter who asked not to be named before a public announcement. The measure would require the agency to submit all significant Clean Air Act rules to a cost-benefit analysis, coming even as the EPA limits what potential benefits get considered.