This lesson plan is part of the DiscoverySchool.com lesson plan library for grades 6-8. It focuses on aquatic habitats and how community wastewater-disposal methods can harm these habitats. Students research the harmful effects of wastewater as well as environmental techniques, then invite a guest speaker to class to discuss this subject and answer their questions. Included are objectives, materials, procedures, discussion questions, evaluation ideas, suggested readings, and vocabulary. There are videos available to order which complement this lesson, an audio-enhanced vocabulary list, and links to teaching tools for making custom quizzes, worksheets, puzzles and lesson plans.