Mississippi Power’s Watson Plant still has two coal-fired units which aid in providing power to its 186,000 customers. With the help of Robert Wiygul, the Sierra Club filed suit in hopes of encouraging Mississippi Power to stop using coal power. As part of the settlement, Mississippi Power agreed to convert from coal to natural gas at plants in south Mississippi and Greene County, Alabama. This decision was part of an effort to end litigation concerning construction of a coal-fired plant in Kemper County. The Sierra Club agreed to dismiss and withdraw all pending legal and regulatory challenges against the Kemper project and Plant Daniel. Furthermore, they also agreed to refrain from formally intervening in all existing and anticipated regulatory proceedings for those two plants for the next three years. Ed Holland, Mississippi Power president and CEO, said the changes are needed to comply with new federal environmental standards.