The Obama Administration has been moving aggressively to control greenhouse gas emissions under the Clean Air Act and other pre-existing statutory authority. Much of this new regulation was facilitated – if not mandated – by the Supreme Court’s decision in Massachusetts v. EPA. These...

In their essay Breaking New Ground on Issues Other than Global Warming, Professors Kathryn A. Watts and Amy J. Wildermuth have presented a thoughtful preliminary analysis of the Supreme Court's handiwork in Massachusetts v. EPA. They are correct that the decision potentially paves new ground in...

Stabilizing atmospheric concentrations of greenhouse gases at double their pre-industrial levels (or lower) will require emission reductions far in excess of what can be achieved with current or projected levels of technology at a politically acceptable cost. Substantial technological innovation...