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...

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...