Across
- 4. natural resources
- 5. attainable
- 8. heating system
- 12. to make a resolution
- 13. natural unprocessed products
- 14. to recycle
- 15. to save
Down
- 1. to use again in a different way
- 2. primary sources
- 3. to reduce
- 6. isolation
- 7. to use, consume
- 9. waste products
- 10. prevent something from getting worse
- 11. natural surrounding