The coal industry and its allies in Congress have been quick to criticize the [new regulation which will impose first-ever limits on carbon dioxide from newly built power plants] in advance of its release, even though some of the details have yet to be disclosed, saying it will raise electricity prices and the cost of producing power, particularly from coal.
via news.yahoo.com
General environmental economic principle: Raise prices on things that impose external costs, lower prices on things that generate external benefits.