Using a controlled environment and a common air pollutant, learners observe the direct effect sulfur dioxide has on plants. Squash and marigold plants are germinated and then placed in an SO2 saturated environment where growth is monitored and recorded. Kit includes a special glove bag to be used as an environmental chamber and all materials needed for a classroom demonstration. Teacher's Guide and reproducible student worksheets are also included. Grades 6-12. Kit.