Coal has a long and proud history in America, but after a decade of decline from accounting for 50% of the nation's power output, its days as a power source seem to be numbered.
For the first time ever, for three days, wind and solar power produced more electricity in the U.S. than coal, according to a report from the Rhodium Group. And as NPR reported, coal does not appear to be well poised to see a comeback anytime soon.