Earth Day Crossword

Advanced Earth Day-themed Crossword Puzzle

1. In peril of being lost forever
2. Produced by a living organism
3. Organic matter that is broken down and used as a soil amendment
4. Using materials again and again
5. The envelope of gases that surrounds the Earth
6. The totality of the physical world, including plants and animals
7. A natural resource used for drinking, irrigation, and recreation
8. A mixture of gases that forms the Earth's atmosphere and is necessary for the respiration of living organisms
9. A building with transparent walls and roof that is used to cultivate plants
10. The destruction of natural forests and woodlands
11. Area that offers necessary resources
12. A layer in the atmosphere which shields us from ultraviolet radiation
13. A tall plant with a trunk and many branches, typically growing to a considerable height
14. A large area of land where trees are the dominant vegetation
15. Often used in place of glass, metal, and wood
16. Fith largest planet in the solar system
17. A light, gentle flow of air
18. A component of carbon dioxide
19. Adverse alteration of the physical, chemical, or biological properties of air, water, or soil
20. The state of the atmosphere in a given area