Across
- 2. to contaminate (air, water, land) with harmful substances
- 4. overall weather in a certain area for a long period of time
- 5. decayed organic material used as a plant fertilizer.
- 8. to use less of something
- 9. to deplete
- 10. to put something in the trash
- 11. useful energy that is collected from renewable resources(solar panels, wind mills, etc.)
- 12. to destroy completely
Down
- 1. a natural fuel (coal, gas)
- 3. convert waste into reusable material
- 6. able to be maintained at a certain level
- 7. to make a tree or another plant fall down