Green Energy's Forgotten Past, Uncertain Future

This afternoon, I participated in a live webchat about energy's past, present, and future with Alexis Madrigal and Eli Kintisch. If you missed it, you can read the (not live) transcript anytime. Some of the subjects discussed: What makes low-carbon energy today different from the times people have briefly gotten into it in the past?; why should you be paying attention to the way the military thinks about energy?; and what matters more&mash;population or consumption?