CHARLESTON - West Virginia and eight other states filed a major brief in the United States Supreme Court Thursday opposing the U.S. Environmental Protection Agency's new rule on cross-state air pollution. "Coal and natural gas are a critical component of our nation's electrical grid and our state's economy. West Virginia is the second largest producer of coal, and our natural gas industry is booming. This move by the EPA is just one more effort to slam the door on energy-producing states," West Virginia Attorney General Morrisey said. "It is a blatant attempt to promote a reckless agenda that picks winners and losers and puts our nation's goal for energy independence in a tenuous position."