Lecture, three hours; discussion, one hour. Requisite: one course from course 1, 2, 3, 51, M100, 102, or 112. Critical survey of potential strategies to address climate change, including solutions in infrastructure, transportation, energy, waste, and agricultural sectors, as well as geoengineering. Exploration of roles of communication, equity, religion, social change, and education in mitigating climate change. P/NP or letter grading.