In Ohio, however, the electricity cooperative American Municipal Power says the term also applies to a 1,000-megawatt coal-fired power plant it wants to build along the Ohio River.
The Columbus-based company has asked for a $30 million, low-interest loan using money that state lawmakers and Gov. Ted Strickland set aside last year for advanced-energy projects.
State officials have yet to approve the loan, but they and American Municipal Power say the proposed plant qualifies because it would use a new type of scrubber that would capture pollutants that help create smog, soot and acid rain.
"We want to make sure that what is being built in Ohio is a next-generation technology that is as clean as can be," said Kimberly Gibson, assistant energy adviser at the Ohio Air Quality Development Authority.