Age: President Barack Obama could leave office with the most aggressive, far-reaching environmental legacy of any previous occupant of the White House. Yet it is very likely that not a single major environmental law will have passed during his two terms in Washington.
Instead, Obama has turned to the vast reach of the Clean Air Act of 1970, which some legal experts call the most powerful environmental law in the world. Faced with a Congress that has shut down his attempts to push through an environmental...