Charlotte Observer: Debate over regulating carbon dioxide has strengthened the case for going forward with Duke Energy’s proposed Lee nuclear plant near Gaffney, S.C., CEO Jim Rogers says. Duke has made no final decision to build the $11 billion plant, which would be its first nuclear operation since the 1980s. But capping limits on carbon dioxide, which is emitted by Duke’s coal-fired plants, is expected to be expensive for utilities. Duke, meanwhile, says it needs to build more power plants to keep up …