Earth Day Crossword Puzzle

Advanced Earth Day-themed Crossword Puzzle

1. A mixture of gases that make up the Earth's atmosphere
2. Often used in place of glass, metal, and wood
3. A liquid that covers 70% of the Earth's surface
4. A mixture of decaying plant and animal matter used to enrich soil
5. Made from living or once-living organisms
6. In jeopardy of disappearing
7. Fith largest planet in the solar system
8. Adverse alteration of the physical, chemical, or biological properties of air, water, or soil
9. Found in all living organisms
10. A structure with walls and roof made of a translucent material to let in sunlight and heat
11. The atmospheric conditions of a region over a long period of time
12. Location that meets the needs of a species
13. A woody plant with a single trunk and many branches
14. A large area of land covered with trees and other vegetation
15. The removal of vegetation from an area of land
16. A gas which absorbs harmful UV radiation
17. A light, gentle flow of air
18. Using materials again and again
19. The elements of the world, especially plants, animals, and landscapes
20. The air or gas which encircles a celestial body