Earth Day Crossword

Advanced Earth Day-themed Crossword Puzzle

1. A material that is often used for packaging
2. Derived from living sources
3. A resource that can be reused
4. A layer of air that surrounds a planet
5. A mixture of decaying plant material that is used to enrich the soil
6. A building with walls and a roof made of transparent material, used to grow plants year round
7. A major element in the human body
8. To use something again after it has been used up
9. Reducing waste and pollution
10. A place where a living organism lives and grows
11. The physical and biological factors that affect the life of an organism
12. A wooded area, usually with a lot of trees and plants
13. A color between blue and yellow
14. Air in motion
15. A sphere made of land and water
16. In danger of becoming extinct
17. A gas that absorbs ultraviolet radiation
18. A tall plant with a woody stem and branches
19. A mixture of gases that surrounds the Earth
20. Energy from the sun
21. The introduction of contaminants into the air, water, or soil
22. Used for drinking, washing, and growing food
23. The environment and its features