Across
- 4. Contamination of the environment, often caused by human activity
- 5. Amount of carbon dioxide emissions for which an individual or group is responsible
- 7. Practices that do not deplete natural resources
- 8. Part of the Earth's atmosphere that absorbs most of the Sun's UV radiation
- 10. Gases that trap heat in the Earth's atmosphere
- 12. Disappearance of a species from Earth
- 13. Natural home or environment of an organism
- 16. Long-term alteration of temperature and weather patterns
- 17. Catching too many fish, leading to a depletion of fish populations
- 18. Variety of different species in an ecosystem
- 19. Dense forest found in tropical areas with heavy rainfall
- 20. Process of converting waste materials into reusable materials
Down
- 1. The clearing of trees on a large scale
- 2. Decayed organic material used as a plant fertilizer
- 3. Process by which plants convert sunlight into energy
- 6. Preservation and protection of natural resources
- 9. Energy that comes from resources that are naturally replenished
- 11. Animals living in their natural environment
- 14. Community of living organisms and their environment
- 15. Species at risk of extinction