Along the Pennsylvania Turnpike, a series of billboards sponsored by FORCE, a pro-coal lobby, make the argument for coal-based power by arguing that “wind dies” and “the sun sets.” Coal wants you to think renewable energy is unstable, uneven.

Bad news, coal. A massive study from the National Renewable Energy Laboratory (NREL) modeled the impacts of a national energy grid with renewable power comprising between 30 and 90 percent of the mix — including the requisite generation, transmission, and storage. In short:

The central conclusion of the analysis is that renewable electricity generation from technologies that are commercially available today, in combination with a more flexible electric system, is more than adequate to supply 80% of total U.S. electricity generation in 2050 while meeting electricity demand on an hourly basis in every region of the United States.

That quote scratches the surface of the NREL’s findings, which follow collaboration with 110 contributors from 35 organizations inside and outside the government. (The list of abbreviations used in the report itself runs two-and-a-half pages.) Another study released in 2010 found that Europe could similarly make a transition to a renewable-heavy energy infrastructure.