Across
- 2. Process of turning waste into new materials
- 7. Energy source that naturally replenishes
- 9. Breaking down food scraps into nutrient‑rich soil
- 10. Animals living freely in natural habitats
- 11. Layer of gases surrounding Earth
- 13. Major greenhouse gas trees help absorb
- 14. Day April 22 celebration
Down
- 1. Power generated with minimal environmental impact
- 3. Fuel made from ancient plants and animals
- 4. Protective layer that shields Earth from UV rays
- 5. Community of living organisms interacting with their environment
- 6. Large geographic areas defined by climate and species
- 8. Power from the sun
- 12. Our home in the solar system