Earth Day Crossword

Advanced Earth Day-themed Crossword Puzzle

1. To use something again after it has been used up
2. A layer of air that surrounds a planet
3. Covers 70% of Earth's surface
4. At risk of extinction
5. A gas that absorbs ultraviolet radiation
6. Earth's main source of energy
7. A hue that can be seen in many plants
8. The medium that carries sound waves
9. A sphere made of land and water
10. A place where a living organism lives and grows
11. The environment and its features
12. Decayed plant and animal material used to improve soil
13. A resource that can be replaced
14. Reducing waste and pollution
15. Harmful substances released into the air, water, or soil
16. A material that is used to make toys and containers
17. A structure made of glass or plastic to protect plants from weather
18. Long-term weather patterns in a certain area
19. Derived from living sources
20. A tall woody plant with a single trunk
21. The complex of physical, chemical, and biotic factors that act upon an organism or an ecological community
22. A component of organic molecules
23. A current of air blowing from a particular direction
24. A place with a lot of trees and plants