We started our series on solar energy at a small scale. This time, we are going big -- the Al Kharsaah Solar Plant in Qatar is one of the largest solar farms in the world. In this episode, we're going to take a closer look at solar at scale—exploring the limits to scaling up this seemingly unlimited energy source, and the innovations underway today that could define what the solar industry looks like in the future, both in solar photovoltaics like in Qatar, as well as concentrating solar thermal. Closing the Gap is hosted by Gwen Holdmann and edited by Jennifer Pemberton. This episode was produced by Liz Smith and Tony Williams. Music is from Blue Dot Sessions.