Across
- 2. the wise use of natural resources
- 3. the careful and responsible management of a resource
- 5. a resource that forms at a rate that is much slower than the rate at which it is consumed
- 10. the removal of trees and other vegetation and soil to get to the minerals below
- 11. air _______ - measuring how clean or polluted the air is
- 12. any heating or natural water that results from human activity
- 15. water that is suitable to drink
- 16. the process by which land becomes more desert-like and unable to support life
- 17. the process by which human activity and natural process damage land
Down
- 1. a tiny particle of solid that is suspended in air or water
- 4. the effect by which certain gases in the atmosphere absorb and reradiate thermal energy
- 5. pollution that comes from many small sources and is more difficult to control
- 6. a body of water that usually forms behind a dam
- 7. the natural resource that humans use to make objects or to consume as food or drink
- 8. forms when ground-level ozone and vehicle exhaust react in the presence of sunlight
- 9. any natural material that is used by humans, such as air, soil, minerals, water, petroleum, and animals
- 13. an increase in the amount of nutrients in water
- 14. the growth of urban areas caused by people moving to the cities