Across
- 5. Ability to maintain balance over time
- 6. Variety of genes within a species
- 7. Species at risk of extinction
- 8. Complete disappearance of a species
- 12. Excessive harvesting of natural resources
- 13. Introduction of harmful substances into the environment
- 14. Destruction or degradation of natural habitats
- 15. Pollution from diffuse sources, hard to pinpoint
- 16. Measure of human impact on the environment
- 18. Long-term alteration of Earth's climate
- 23. Flow of water carrying pollutants into water bodie
- 24. Pollution from a single, identifiable source
- 26. Preservation and protection of natural resources
- 27. Chemicals used to kill pests
- 28. Clearing of forests for other land uses
Down
- 1. Non-native species that adversely affect ecosystems
- 2. Conversion of fertile land into desert
- 3. Chemicals used to kill unwanted plants
- 4. Factors that affect the environment
- 9. Substances used to enrich soil for plant growth
- 10. Breaking up of habitats into smaller, isolated pieces
- 11. Measure of carbon dioxide emissions
- 17. Rapid growth of algae in water bodies
- 19. Gases that trap heat in Earth's atmosphere
- 20. Act of destroying or damaging something
- 21. Process of wearing away soil or rock
- 22. Variety of life
- 25. Rainfall with acidic components