EPA Administrator Stephen L. Johnson this week told Congress how EPA would respond to the Supreme Court’s decision last April in Massachusetts v EPA. The Court over-ruled EPA’s decision that it lacked authority to regulate CO2 emissions under the Clean Air Act (CAA) and ordered the agency to consider whether and how carbon dioxide emissions from new vehicles should be regulated under the CAA.
In letters to Senators Barbara Boxer (D-Calif.) and James Inhofe (R-Okla.) and Representatives John Dingell (D-Mich.) and Joe Barton (R-Tex.), Johnson explained that EPA would make an Advance Notice of Proposed Rule-making (ANPR), which would open the whole issue to public comment.
Johnson explained that regulating CO2 emissions from autos under the CAA raised so many complex issues within the workings of the Act that careful consideration was necessary. As Johnson wrote in his letter: “Such an approach makes sense because, as the Act is structured, any regulation of greenhouse gases—even from mobile sources—could automatically result in other regulations applying to stationary sources and extend to small sources, including many not previously regulated under the CAA.”
This is to say that Johnson and EPA have recognized that ruling that CO2 emissions endanger public health and welfare would almost certainly create a regulatory nightmare. Therefore, they are going to solicit expert opinion.
Johnson said that the ANPR would be issued this spring. Then after reviewing the comments received, the EPA Administrator can make a decision. That decision will almost certainly be made in the next administration.