Thomas Feiler is managing director of the Rocky Mountain Institute, an entrepreneurial, nonprofit organization that seeks to foster the efficient and restorative use of resources to create a more secure, prosperous, and life-sustaining world. Steve Rosenfeld interviewed Mr. Feiler for TomPaine.com. TomPaine.com: You and your colleagues at the Rocky Mountain Institute have said that energy security starts with using less energy, that is, using energy more efficiently to do the tasks that make up people's daily lives. What do you mean by that, what's called 'demand-side management?' Thomas Feiler: Well, [the] first thing to say is the debate about energy security is often very misleading, in as much as we like to talk about domestic versus foreign energy sources, as opposed to the basic architecture of the system. The architecture of the system is what provides us security. And with regards to the architecture of the system, the best thing you can do on energy security is simply use less of it. By using less energy, you put less demands on both the system itself and less demands to be purchasing oil, especially coming through very vulnerable places. So, for instance, our oil right now is coming through two very vulnerable choke points. First through the Persian Gulf, which has a number of political problems, especially now. And, of course, the Alaskan Pipeline, which is equally vulnerable to all sorts of mischief. As we saw just three weeks ago, a drunk walked out of a bar in Fairbanks and with