The Sierra Club has filed a lawsuit trying to stop Mississippi Power Co. from developing a coal-fired, electric-generating plant in the east central part of the state.
The lawsuit was filed Thursday in coastal Harrison County Chancery Court.
In May, the state Public Service Commission voted 2-1 to ease restrictions it had put on the Kemper County plant.
Sierra Club director Louie Miller describes that decision as a "flip flop." He says it would allow Mississippi Power to charge rate payers for the costs of the plant before it's even built.
Mississippi Power says the plant would convert lignite into a gas that would fuel turbines to create electricity.
Officials say the plant will create 260 permanent jobs and 1,000 jobs during construction.