Across
- 1. waste that is good for the earth
- 3. a layer of oil on the surface of water
- 9. preservation of natural resources
- 11. the natural home of an animal or plant
Down
- 2. contamination that affects health and quality of life
- 4. the normal weather conditions in a region
- 5. conditions that affect life in an area
- 6. to use something more than once
- 7. increase in the Earth's surface temperature
- 8. something that doesn't exist anymore
- 10. a mixture of smoke and fog