On Earth Day, April 22, the Tennessee Valley Authority will launch a “Green Power Switch” program, the biggest clean energy project in the Southeast. By the end of the year, TVA plans to erect three wind turbines on a reclaimed strip mine, put solar panels at schools and other public sites, and construct a landfill gas-to-energy facility. For the first time, customers of TVA, the nation’s largest public power producer, will have the option of paying a little more to know that their electricity comes from renewable sources. TVA Chair Craven Crowell: “We will be following this very closely to determine the demand.”