EPA Modifies the US Sulfur Trading Program

From Richard Woodward posting on ResEcon:"Some of you may have noticed in the news today mention of new regulations by the USEPA on SO2 and NOx emissions. The title of the articles could have been, "The SO2 trading program is dead. Long live the SO2 trading programs!"Since many of us use the SO2 program as the epitome of what a trading program should look like and teach about it in our classes,