Across
- 3. Substance produced that is harmful to the environment
- 4. Form of energy that can be naturally replenished
- 6. Converting waste materials into new ones
- 8. To spread or operate internationally
Down
- 1. The protection of habitats and ecosystems
- 2. The permanent removal of trees
- 5. Wearing down or damaging of something
- 7. The power to do work