In the “Copenhagen Accord” (December 2009) governments endorsed the goal of “stabilizing greenhouse gas concentration in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system”. This seminar will examine selected issues of science, technology, economics, politics, and law involved in efforts to achieve climate goals. Among others, issues include international negotiations and the work of the IPCC (Intergovernmental Panel on Climate Change), the “common but differentiated responsibilities” of developed and developing countries, “cap & trade” or “cap & dividend” systems, emissions “offsets” through the Clean Development Mechanism, financial & technology transfer, energy efficiency commitments by China & India, “low-carbon economies”, and the design of energy and climate bills pending in the US Congress. Research papers are required; some papers may qualify for upperclass writing credit. ** A student who fails to attend the initial meeting of a seminar (designated by an (S) in the title), or to obtain permission to be absent from either the instructor or the Registrar, may be administratively dropped from the seminar. Students who are on a wait list for a seminar are required to attend the first seminar meeting to be considered for enrollment.