Across
- 1. to make an area or substance, usually air, water, or soil, dirty or harmful to people, animals, and plants
- 4. to become or to make something become smaller
- 7. able to be used more than once
- 9. not harmful to the environment
Down
- 2. poisonous, or relating to poisonous substances
- 3. relating to the protection of the environment
- 5. Something that needs to go to trash after use
- 6. to use something again for a different purpose
- 8. able to decay naturally and in a way that is not harmful