Hardly a day goes by without some newsworthy item being reported on Earth's changing climate. Often the stories are contradictory, tainted by parochialism and extremism, not only by the conservative and liberal media, but also by the camps of so-called believers and deniers. This seminar begins with a review of the history of how decisions regarding human interactions with the environment have either doomed past societies to failure or enabled long-term, sustainable success. That sets us up to examine the science of global warming, in a manner accessible to non-scientists, as well as the potential consequences of a rapidly changing climate, and the economics of large-scale renewable resources needed to avert climate catastrophe. During the final few weeks of this seminar, students will work in groups representing various parts of the world to negotiate an international plan to transition the world energy supply to renewable resources that emit little or no greenhouse gases.