It would require 144,000 offshore turbines standing 270 feet tall — not one of which exists since proposals have stalled due to controversy and costs. But the analysis shows its doable and where the best locations are, says study co-author Mark Jacobson, a Stanford professor of civil and environmental engineering.

The team is not advocating for an “all wind” approach, saying it’d be foolish to put all of one’s energy eggs in a single basket, but they do think it could reach up to 50 percent. Today the U.S. gets about 4 percent of its electricity from wind, but only via turbines on land.