I would like an episode explaining the difference between alternating and direct current, is one more efficient than the other, what applications are different between the 2 forms, and how do they apply to renewable energy. I saw something that mentioned solar power being DC? I am a medical person and have always been quickly lost by discussions about energy and transference of it. It seems like magic to me. I know we're on AC b/c of the machinations of the elite of the industrial era, but beyond that, I'm lost.