Sierra Club challenged FERC decision approving the construction and operation of three new interstate natural-gas pipelines in the southeastern United States.

Determining that it has jurisdiction to entertain Sierra Club's claims, the DC Circuit held that the FERC's environmental impact statement did not contain enough information on the greenhouse-gas emissions that will result from burning the gas that the pipelines will carry.

However, the Commission acted properly in all other respects. Accordingly, the court granted Sierra Club's petition for review and remanded for preparation of a conforming environmental impact statement.