Across
- 1. Non-native species that harm the environment
- 5. Gradual deconstruction of something by natural forces
- 7. Area of land that drains into a body of water
- 9. Resources that cannot easily be replaced
- 10. Water held underground in the soil or rock
- 11. Long-term changes in temperature and weather patterns
- 12. Decomposed organic matter used as fertilizer
- 15. Protecting natural resources for the future
- 17. Community of living things and their environment
- 18. When too many nutrients in water cause algae to grow like crazy, which can harm aquatic life
- 20. Harmful substances in the environment
Down
- 2. Meeting our needs without messing up future generations'chances to meet theirs
- 3. Variety of life in an area
- 4. Convert waste into reusable material
- 6. Rain containing pollutants like sulfuric and nitric acid
- 8. Protecting natural resources for the future
- 13. Air pollution that reduces visibility
- 14. Clearing out forest for other uses
- 16. Protective layer in the Earths atmosphere that absorbs UV radiation
- 19. Natural home or environment of an animal, plant, or other organism