The second part of our energy series. We talk about storing energy in batteries, heated rocks, abandoned mines, hot water heaters, and giant refrigerators. We have more from the exclusive Elon Musk TED talk, and a return call from Secretary Mnuchin. Outro music: This is Not Mine by I Would Set Myself On Fire for You.
We're back after a few months with a multi-part series on energy. The first part is about sustainability and energy sources. We also have a clip from an exclusive TED talk, with a famous hero as the speaker. Outro music: Ghost by Hong Kong Express.