Why the U.S. government is spending $7 billion on solar for low-income homes

On a hot afternoon in a suburb of San Francisco, Hugo Salas stands in the middle of the street looking up at the reason why his electric bills are so low. Salas has solar panels on his rooftop, which he got through a nonprofit program designed for low-income households. Salas, an ironworker, didn’t pay anything for the panels...