Audience: Students; Grades: 4-5; Subject: Science. (2004) Explores environmental problems and solutions defining urban environments, living and non-living components of environment, ecology, and wetland ecology. Explains how air, land and water can become polluted and those pollutants can affect plant and animal life. Introduces the problem of air pollution and global warming;biological or species extinction, and over-consumption of natural resources. For the teacher's guide go to: https://drive.google.com/folderview?id=0B9ZT7PYcIjLfY0NVYUZfaHhiRzQ&usp=sharing