Duke Energy Corp. is seeking a federal cap on carbon-dioxide emissions at the same time the company is pushing for state approval to build two coal plants at its Cliffside facility in North Carolina. Ten major companies, including Charlotte-based Duke ( …

Global warming restrictions and even technology that takes greenhouse gases out of burned coal are probably around the corner, but right now Duke Energy needs $2 billion from ratepayers to build two coal-fired power plants, company CEO John Rogers said Tue …