Across
- 1. Harmful to health or nature
- 4. Powers electric vehicles
- 8. Natural and chemical-free
- 10. Symbolic color of eco-efforts
- 13. Safe for the environment
- 14. Dirty air, water, or land
- 15. Energy from sunlight
- 16. Common pollutant in oceans
- 17. Eco-friendly over time
- 20. Gases released by engines
Down
- 2. Element tied to pollution
- 3. Organic waste turned to soil
- 5. Energy that doesn’t run out
- 6. Home for wildlife
- 7. Process materials for reuse
- 9. Activity to remove trash
- 11. Save energy or resources
- 12. Powers the plant and machines
- 18. Unused or leftover material
- 19. Renewable energy from air