This course considers the science needed to understand human-induced threats to the atmospheric environment, with special emphasis on the global changes that are taking place, or are anticipated. We will discuss the greenhouse effect (and its impact on climate), ozone depletion, the polar ozone holes, and urban air pollution. Some basic meteorology will be presented, including how climate changes might affect the frequency and severity of hurricanes and tornadoes. Students will have access to real-time weather information via computer. This lecture course is intended for non-science concentrators, and there are no prerequisites. Grades will be based on three one-hour exams (no final exam) and homework.