Across
- 1. Energy from the sun
- 4. The planet we live on
- 9. The long-term weather patterns in an area
- 11. Forest loss due to cutting trees
- 12. A community of interacting living organisms and their environment
- 13. Underground layer of water-bearing rock
- 14. Harmful substances introduced into the environment
- 15. Using resources in a way that preserves them for the future
- 16. A resource that cannot be replaced quickly
- 17. Decayed organic material used as fertilizer
- 18. Process plants use to convert sunlight into energy
Down
- 2. Gas essential for breathing
- 3. To use less of something
- 5. Material that can be broken down by nature
- 6. Total greenhouse gases produced by human activities
- 7. Natural fuel formed from ancient remains
- 8. Protecting the environment
- 10. To make something new from used materials
- 17. The outermost layer of the Earth