Across
- 3. Color of nature
- 4. Flowing water to the sea
- 5. Land covered with many trees
- 7. Ground where plants grow
- 9. White mass of vapor in the sky
- 11. Short for carbon, causes pollution
- 13. Plant’s beginning stage
- 14. Short for ecology, eco-friendly
- 20. Very large sea
- 22. Dirty air, smoke + fog
- 23. A tall plant with trunk and branches
- 24. Household waste
- 26. Existence of living beings
- 28. Hard solid from the ground
- 31. Water falling from the sky
- 32. Frozen water at the poles
- 33. Green part of a plant
- 35. Moving air
- 36. A body in space, like Earth
Down
- 1. Small grains on the beach
- 2. To keep safe or to use less
- 3. Green plant that covers the ground
- 4. Part of plant in the soil
- 6. Use again, not throw away
- 8. Things thrown away
- 9. Opposite of dirty
- 10. Our planet
- 12. Colorful part of a plant
- 15. Layer that protects Earth from UV
- 16. Heat and flame
- 17. Energy source for cars
- 18. Liquid essential for life
- 19. Large body of salt water
- 21. Gas we breathe in
- 25. Star that gives light and heat
- 27. Frozen water
- 29. Black liquid fuel
- 30. Animal that lives in water
- 34. Wild animals
- 35. Rising and falling of sea water