The cost of solar panels is falling rapidly in the United States. And as the panels become more affordable, they're popping up on rooftops around the country.
Meanwhile, the U.S. is trying to find better ways to back up its power system against blackouts. And while it may seem counterintuitive, more solar power does not mean fewer blackouts — at least not yet.
The tiny town of Del Norte, in southwestern Colorado, is a perfect example. Despite being covered in solar panels, Del Norte is still at risk of losing power if its main power line goes down.