WASHINGTON, Aug. 14 -- Sen. Edward J. Markey, D-Mass., has introduced legislation (S. 4523) to regulate large-scale emissions of methane and natural gas. The bill was introduced on Aug. 12. It was referred to the Senate Energy and Natural Resources Committee. For more information, Sen. Edward J. Markey, 255 Dirksen Senate Office Building, Washington, DC 20510; 202/224-2742; or in state at 975 President John F. Kennedy Federal Bldg., 222 Milliken Blvd., Ste. 312, Fall River, MA 02721; 508/677-0 more ST