Reuters: Georgia legislators introduced a bill on Tuesday that, if passed, could limit utility use of certain Appalachian coal beginning in 2011 and place a moratorium on new coal-plant construction in the state. Interest in coal-fired power plants, which produce about half the electricity consumed in the United States, surged when natural gas prices rose in 2002, but have come under attack from environmental groups. Coal emits more carbon dioxide than any other fuel so public concern …