Earth Day Crossword

Advanced Earth Day-themed Crossword Puzzle

1. The removal of vegetation from an area of land
2. A mixture of gases that forms the Earth's atmosphere
3. The envelope of gases that surrounds a planet
4. A large area of land that is densely covered with trees
5. A mixture of decaying plant and animal matter used to enrich soil
6. A layer in the atmosphere which shields us from ultraviolet radiation
7. Fith largest planet in the solar system
8. Often used in place of glass, metal, and wood
9. On the brink of extinction
10. Area that offers necessary resources
11. The atmospheric conditions of a region over a long period of time
12. A tall perennial woody plant with a single main stem and many branches
13. The basis of all organic molecules
14. A light, gentle flow of air
15. A building with transparent walls and roof that is used to cultivate plants
16. The process of making land, water, air, or other parts of the environment dirty and not safe or suitable to use
17. A liquid that covers 70% of the Earth's surface
18. The physical universe, including plants, animals, and landscapes
19. Using materials again and again
20. Made from living or once-living organisms