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

Utah's multibillion-dollar IPP Renewed project is adding a pair of cleaner hydrogen-fueled turbines as coal-fired units at the power plant are approaching retirement.

By Ivan Penn President Trump last week issued executive orders designed to revive the use of coal in power plants, a practice that has been steadily declining for more than a decade. But the ...