Across
- 6. Gray-brown haze
- 7. Greatly increased the worlds food supply
- 9. Number of different species in biosphere
- 10. What we revolve around
- 11. Wise management of natural resources
- 12. Ecosystem splits into pieces
- 14. The man who invented electricity
- 15. Variety of communities and habitats
- 17. The month of Christmas
- 18. Increase of average temperature in biosphere
- 21. Harmful material
- 22. Loss of forests
Down
- 1. A fossil fuel is this type of resource
- 2. Raising of aquatic animals for human consumption
- 3. Disappearance of species
- 4. Large field plated with single variety
- 5. The wearing away of surface soil
- 7. Sum of different forms of genetic information
- 8. High concentration of ozone gas
- 9. A way of using natural resources without deplenting them
- 13. Biological Diversity
- 16. The band who sang Back in Black
- 19. 75% of Earth is covered by this
- 20. A tree is this type of resource
- 23. The practice of farming