Coal today accounts for about 40 percent of electric power generation, down from 45 percent in 2010. The Energy Department's latest forecast figures that it will remain roughly the same through 2035. Part of that forecast saw new coal use increasing slowly after 2015. But that calculation was made before the Environmental Protection Agency announced the proposal for new plants Tuesday.
Kevin Book, the managing director for research at ClearView Energy Partners, said coal probably would retain its place as the biggest source of electricity in 2035, but barely. It remains to be seen whether natural gas surpasses coal or state laws continue to support an increase in renewable energy, he said.
It's also likely that some older coal plants will be kept around longer than originally intended, Book said. "If you can't build more, you'll will love the ones you have a lot longer."