Unit 9 Vocabulary

4. a lake that stores water for human use
6. pollution that comes from a specific site
11. the process where land becomes more desertlike; prone to dust and erosion
13. very small particles of liquid or solid matter
14. suitable for drinking
16. the buildup over time of nutrients in freshwater lakes and ponds that leads to an increase in the growth of algae
17. pollution that comes from many sources rather than from a single, specific site
18. Natural Resources that are used to make objects, food or drink
19. the trapping of the sun's warmth in a planet's lower atmosphere by gases
20. when natural processes or human activity damage land so it cannot support ecosystem

1. the wise use of and preservation of natural resources
2. natural resources that humans use to produce energy.
3. Coal, oil, natural gas, and other fuels that are ancient remains of plants and animals.
5. the removal of trees or vegetation
7. materials found in nature that are used by humans
8. responsibility for conserving and restoring the Earth's resources for future generations
9. Something produced in nature more slowly than it is consumed by humans
10. the development of large land areas
12. A natural resource that can be replaced at the same rate at which the resource is consumed
15. air pollution that forms when ozone and vehicle exhaust react with sunlight