Across
- 3. nonrenewable resource that comes from dead plants and animals
- 4. process by which land become like a desert.
- 6. body of water formed behind a dam.
- 7. growth of urban areas.
- 8. drinking water.
- 9. quality measuring how clean the air is.
- 10. resource natural resource that can be renewed.
- 12. resource natural material used by humans.
Down
- 1. removal of trees
- 2. waste added to water
- 5. saving natural resources.
- 11. resource natural resource that humans use to generate energy.