This video program focuses on four rivers: the Mississippi, the Amazon, the Jordan, and the Mekong. Each locale serves as an example of what can happen when human beings tamper with the natural system of a river. Without thoughtful planning, the consequences can be disastrous,, but when communities work together, a balance can be achieved between the needs of people and the needs of nature. 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)