This week, we are offering the first episode of a new podcast: The Big Switch.It’s a five-part series about how to clean up the energy system -- told in a clear, understandable and fun way. The show is hosted by Dr. Melissa Lott, research director at Columbia University's Center on Global Energy Policy.Stephen Lacey is the show's executive editor.Listen to the first episode of The Big Switch right now -- and subscribe to the show on Apple, Spotify, and any other place you get podcasts.