Addressing the threat of climate change means executing a successful energy transition. But as the transition proceeds, we are increasingly having to confront the impacts of transition technologies, and consider the trade-offs of choosing those technologies over the conventional technologies that they are displacing - because nothing we can do is without an impact of some kind, and everything we build requires the use of raw materials. So the question of what is truly sustainable is beginning to take a larger importance in the formation of policies designed to advance energy transition. But energy is still being taught primarily as part of the engineering discipline, leaving students from non-engineering disciplines in need of ways to learn something about energy, in order to help them be more effective in their work. Fortunately, professor Dustin Mulvaney of San Jose State University in California has a new textbook designed to address this need, titled “Sustainable Energy Strategies: Socio-Ecological Dimensions of Decarbonization.” It’s a very ambitious effort to survey many of the complex topics that are critical for people involved in energy transition to understand. In this episode, we talk with Dustin about why he wrote it, and we take a walk through each chapter in the book to understand the complex questions around what “sustainability” really means in the context of energy transition.