American Electric Power, one of the country’s largest coal-burning utilities, said on Thursday it plans to retire nearly one-quarter of its coal fleet and retrofit other units at a cost of as much as $8 billion to comply with proposed environmental regulations. To meet stricter pollution limits for air, water and coal waste, AEP said…

Exxon Mobil Corp will pay $25 million as part of a settlement to clean up a decades-old oil release in New York City, the state’s attorney general said on Wednesday. The settlement, filed in U.S. district court in Brooklyn, requires Exxon to conduct a comprehensive cleanup of its Greenpoint facility in Brooklyn, which includes oil…

Efforts to permanently plug the world’s largest offshore oil spill reached a milestone when BP Plc’s crucial relief well reached its target — the blown-out Macondo well that began spewing oil almost five months ago, a U.S. official said. Now that the relief well has intersected with BP’s well, workers have an opening through which…