Across
- 7. Federal Law setting a national goal of making all natural surface water fit for fishing and swimming by 1983, banned polluted discharge into surface water and required the metals be removed from waste
- 11. The contamination of the atmosphere by the introduction of pollutants from human and natural sources
- 14. Movement of people from rural areas to cities
- 15. A pollutant that forms in the atmosphere by chemical reactions with primary air pollutants, natural components in the air, or both.
- 17. Urban air pollution composed of a mixture of smoke and fog produced from industrial pollutants and burning fuels.
- 20. A mineral that contains one or more elements of economic value
- 21. A body of rock or sediment that stores groundwater and allows the flow of groundwater.
- 22. Increase in the concentration of acid
- 23. A gas that arises from the earth where radioactive materials are present.
- 24. Destruction of vegetation caused by too many grazing animals consuming the plants in a particular area so they cannot recover
- 25. Cutting down only some trees in a forest and leaving a mix of tree sizes and species behind
- 26. The continuous process by which water moves from Earth's surface to the atmosphere and back
- 28. Water beneath the Earth's surface in sediment and rock formations
- 30. A specific source of pollution that can be identified
Down
- 1. The addition of any substance that has a negative effect on water or the living things that depend on the water
- 2. A process by which nutrients, particularly phosphorus and nitrogen, become highly concentrated in a body of water, leading to increased growth of organisms such as algae or cyanobacteria.
- 3. A method of providing plants with water from sources other than direct precipitation.
- 4. The process of cutting down all the trees in an area at once
- 5. A pollutant that is put directly into the atmosphere by human or natural activity
- 6. An area in which the land and the ecosystems it supports are protected from exploitation
- 8. Rain, sleet, or snow that contains a high concentration of acids
- 9. Atmospheric condition in which warm air traps cooler air near the earth's surface
- 10. A mining method in which soil and rocks are removed to reach underlying coal or minerals.
- 12. An accidental release of oil into a body of water
- 13. A widely spread source of pollution that is difficult to link to a specific point of origin
- 16. The process of returning land to its original condition after mining is completed
- 18. A naturally occurring, usually inorganic solid that has a characteristic chemical composition, an orderly internal structure, and a characteristic set of physical properties
- 19. A range of values used to express the concentration of hydrogen ions in a solution
- 27. A long, thin, fibrous silicate mineral with insulating properties, which can cause cancer when inhaled.
- 29. The sinking of regions of the ground with little or no horizontal movement.