Across
- 2. uses large number of windmills
- 4. this can by distilled into an alcohol
- 7. deposits of useful minerals
- 10. energy from the sun
- 11. mineral examples include concrete, wall board, and granite
- 12. oil, natural gas, and coal formed from plant and animal remains
- 14. using materials again by converting used materials into new and useful products
- 17. gaseous hydrocarbon forming above oil
- 18. nuclear power plants produce highly _____ nuclear waste
- 21. land set aside to protect it fro environmental problems caused by us
- 24. highways, parking lots, buildings....
Down
- 1. energy obtained from magma inside Earth
- 3. causes algae to multiply, using up the oxygen needed for fish to survive
- 5. harms living organisms but destroys pests
- 6. type of mineral resource where materials are not used as fuels or source of metals
- 8. formed from buried remains of microscopic marine organisms
- 9. most abundant fossil fuel
- 13. largest source of water pollution
- 15. to maintain all like on Earth, the water and air must be _____.
- 16. flowing water used to generate electricity
- 19. mineral examples include glass, road salt, and sandpaper
- 20. energy produced by burning wood and alcohol
- 22. yellow-brown haze caused by cars and power plants
- 23. one method to remove fossil fuels from the ground