Lecture, three hours; discussion, one hour. Recommended requisites: courses 1, 51, Environment 10. Development of fundamental understanding of climate change adaptation challenges facing humanity. Such challenges stem from changes in physical climate system, such as warming and increases in heat extremes, loss of snow and ice, sea level rise, increases in extreme precipitation, deepening drought, increases in wildfire, deteriorating air quality, changes in ocean circulation, and ocean acidification. Examination of all these challenges, as well as associated stresses on human and natural systems. Examination of these issues from local, regional, and global perspectives, emphasizing intersections with other deep sustainability challenges. P/NP or letter grading.