By Ken Ward Jr. Two controversial natural gas pipelines proposed for West Virginia could face additional scrutiny because of a new federal court ruling that mandates a more detailed review of the greenhouse gas emissions associated with such projects. Last week, the U.S. Circuit Court of Appeals for the District of Columbia ruled that pipeline regulators at the Federal Energy Regulatory Commission must estimate greenhouse emissions when they consider whether to grant a certificate approving natural gas pipelines. Ruling on a legal challenge brought by the Sierra Club, the court ruled that FERC was wrong when it did not fully evaluate the potential greenhouse gas emissions during its review and approval of a detailed environmental impact statement, or EIS, for the Southeast Market Pipelines Project in Alabama, Georgia and Florida. "We conclude that the EIS for the Southeast Market Pipelines Project should have either given a quantitative estimate of the downstream greenhouse gas emissions that will result from burning the natural gas that the pipelines will transport or explained more specifically why it could not have done so," said the ruling, written by Judge Thomas B.