Most power plants make electricity with a machine called a generator. A 1925 turbine rotor for a Westinghouse generator, Image , Science Service ... Coal and natural gas are currently cheap in the US, and are being used more often.
Feb 2, 2017 ... The battered coal industry rejoiced after the Senate voted on Thursday to repeal a rule that limited companies from dumping mining waste in streams. ... 25 PHOTOS. US Coal Mines. See Gallery. US Coal Mines.