Arizona’s intense summer heat puts a strain on the supply of electricity, and power companies have long turned to older, ...

U.S. production of coal has continued to decline since peaking in 2008, according to a report from the U.S. Energy ...

President Trump has granted two-year reprieves to dozens of coal-fired power plants for meeting tougher emission standards, including one in Arizona.

Homer City Redevelopment released a statement Sunday announcing the last remaining portion of the coal cleaning plant and ...

Following an order from President Donald Trump, the Environmental Protection Agency gave dozens of coal plants an extra two ...