| http://www.w3.org/ns/prov#value | - The EPA mercury rules, one of a raft of clean air standards the agency is launching, have divided the power industry.Companies including Exelon and NextEra that generate most of their power with clean fuel sources such as nuclear, natural gas and renewables have supported the mercury standards, while those that get most of their power from coal, including American Electric Power and Southern hav
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