Across
- 4. A natural source of energy that is not depleted by use
- 6. Put a seed or plant in the ground
- 7. To object against something
- 10. The natural environment of an animal or plant
- 11. A transparent house where you can grow plants
- 12. Preservation and repair of important places
- 15. Use up something
Down
- 1. Give something to charity
- 2. Power
- 3. Produce and discharge something, usually gas or radiation
- 5. To use again
- 6. contaminate with harmful substances
- 8. Risky or dangerous
- 9. Convert waste into reusable material
- 13. To forbid
- 14. Material such as coal or oil that is burned to produce power.