Use this crossword puzzle to introduce or reinforce a unit on recycling with your class. It covers 27 vocabulary words and includes fun clues that kids will enjoy figuring out. Puzzles make great no prep activities for early finishers, bell ringers, morning work, handouts, homework, lesson plan supplements, sponge activities, introductions to new topics, and sub files. The vocabulary words covered in this crossword are: Air, Biodegradable, Cans, Compost, Earth, Ecosystem, Emissions, Energy, Env