Energy is the fundamental necessity of civilization and, indeed, of life itself. And, yet, we cannot repeal the Second Law of Thermodynamics, which teaches that in a closed system such as Planet Earth, the use of energy will gradually transform everything of value into a state of useless entropy. Fortunately, as global climate change acquaints us viscerally with this ineluctable reality and its grim implications, we have a legal and regulatory framework that can be pressed into service to address the entropy challenge without unnecessarily sacrificing public safety and welfare. This intermediate level course is intended to provide students with an intimate familiarity with that legal and regulatory framework. (pre-requisite: Energy Law & Policy in a Carbon-Constrained World)