This videotape attempts to show students how the uncontrolled development of the world's major cities has led to a series of problems such as air pollution, water pollution, limited room for waste disposal, housing shortages, and loss of farmland. The videotape profiles four mega-cities: Mexico City, Shanghai, Istanbul, and New York City. Students explore possible solutions to the cities' problems and consider the need for urban planning. The tape is accompanied by a study guide that includes learning objectives, previewing activities, postviewing activities, suggestions for group discussion and questions, and ideas for special projects. (WRM)