The Supreme Court heard arguments on Wednesday in Michigan v. EPA, asking whether it was unreasonable for the Environmental Protection Agency to ignore costs in determining the appropriateness of regulating mercury emissions from power plants. The EPA’s proposed regulations are expected to cost the coal industry a whopping $9.6 billion, but only offer a meager $500,000 to $6 million in public health benefits.
Cato filed an amicus brief in the case that focuses on why the EPA chose to ignore costs in developing these regulations. It turns out that EPA could achieve its goal of comprehensively regulating utility emissions only if it ignores the costs. That in turn allowed the EPA to single out power plants – which it couldn’t do under other programs, and to avoid working through the states – as the other programs require. This strategy amounts to little more than a clever trick to circumvent statutory limits on the EPA’s own authority.
In effect, the EPA is exploiting nearly harmless levels of mercury emissions as a Trojan horse – an excuse to regulate all power plant emissions, even ones that are covered by other programs that deny EPA the ability to regulate in this fashion.
Chief Justice Roberts picked up on this point from our brief when he questioned the Solicitor General extensively as to the radical disparity between costs and benefits (see discussion starting p.59 here). He also asked pointed questions regarding the EPA’s attempt at making an “end run” around restrictions on the Clean Air Act.