What if one single source of renewable energy could replace our reliance on coal-fired energy? That’s the dream of electrical engineer Scott Brusaw, who, for the better part of a decade, has been working on just such a project. His idea? Cover all the roadways and parking lots in the US with photovoltaic panels to harvest the power of the sun. In the intervening eight years, Brusaw and his wife have received two rounds of funding from the US Federal Highway Administration to develop Solar Roadways.