President Barack Obama’s administration issued the first U.S. standards to cut mercury and other toxic emissions from coal-fired power plants, winning praise from health advocates who say the step is long overdue...Lisa Jackson, the EPA administrator, said today at Children’s National Medical Center in Washington. “This is a great victory for public health, especially for the health of our children.”...In its March proposal, it said the regulation could prevent 17,000 premature deaths from toxic emissions [refers to Southern, American Electric Power, Exelon, Babcock & Wilcox, Alstom, Bracewell & Giuliani]