Across
- 2. the water and human waste that is washed town sinks, toilets, and showers
- 3. the process of eroding or being eroded by wind, water, or other natural agents.
- 6. the number of live births per thousand of population per year.
- 8. pollutants that are released into the air
- 10. the state whereby the human population rises to an extent exceeding the carrying capacity of the ecological setting.
- 13. any form of precipitation with acidic components, such as sulfuric or nitric acid that fall to the ground from the atmosphere in wet or dry forms
- 15. growth whose rate becomes ever more rapid in proportion to the growing total number or size.
- 17. the process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture
- 19. prevention of wasteful use of a resource.
- 20. the practice of allowing renewable resources time to replenish and renew.
Down
- 1. small, solid pieces of material that come from rocks or the remains of dead organisms; earth materials deposited by erosion
- 4. able to be maintained at a certain rate or lev
- 5. the action of clearing a wide area of trees
- 7. the number of deaths per thousand of population per year.
- 9. natural substances that are used up faster than they can be replenished by natural processes. They exist in finite amounts and are considered finite resources
- 11. naturally replenished resources that can be replaced or renewed in a relatively short time, often within a human lifespan
- 12. a type of pollution caused by factories and power plants releasing superheated water into bodies of water
- 14. materials or substances found in nature that humans can use. They can be renewable or non-renewable
- 16. a highly reactive gas composed of three oxygen atoms. It is both a natural and a man-made product that occurs in the Earth's upper atmosphere and lower atmosphere
- 18. the presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects.