Litter, garbage, and pollution are all addressed in a nice instructional activity on waste and recycling. Learners discuss what litter is and how it affects the environment. Then, they sing a song about eliminating litter before going out on campus to clean up any litter they find. A beautiful instructional activity on a very important topic for young children! "Arthur Cleans Up," is the  Arthur episode this instructional activity is meant to accompany.