Across
- 2. formed as waste in industrial processes, whose molecules contain two benzene rings
- 7. represents the amount of oxygen consumed by bacteria
- 8. a brownish-gray haze caused by the action of solar ultraviolet radiation
- 9. a source of energy, such as light or sound, which can be regarded as having negligible dimensions
- 10. movement of saline water into freshwater
- 15. process by which an entire body of water
- 16. occurs when human water pollution speeds up the aging process by introducing sewage
- 19. compounds that have a high vapor pressure and low water solubility.
- 24. an organism causing disease to its host
- 26. a natural phenomenon that involves a change in the normal tendency of the air to cool down with altitude
- 27. underground wastewater treatment structures
- 30. flat area of land next to a river or stream
- 31. watercourse constructed to carry water from a source to a distribution point far away.
- 34. gradual increase in the concentration of phosphorus
- 38. barrier that stops or restricts the flow of surface water
- 40. deviation from the natural temperature in a habitat
- 41. diffuse contamination of water or air
- 42. man-made outdoor earthen basin filled with animal waste
- 45. an embankment built to prevent the overflow of a river.
- 48. used in numerous polymer-based commercial and household products
- 49. underground boundary between the soil surface and the area
- 51. a naturally occurring fibrous silicate mineral
- 52. a mixture of solid particles and liquid droplets found in the air
- 53. Pollutants that are formed in the lower atmosphere by chemical reactions
- 54. an aquifer below the land surface that is saturated with water
- 55. occurs in an aquifer when groundwater is pumped from a well
Down
- 1. wastes that can be decomposed by oxygen-requiring bacteria
- 2. an air pollutant emitted directly from a source.
- 3. nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine
- 4. natural processes enhanced by humans that convey water underground
- 5. a way to skip the soil
- 6. barrier used to regulate or hold back water from a river
- 11. an organism whose presence, absence or abundance reflects a specific environmental condition
- 12. contamination of the indoor or outdoor environment
- 13. air pollution that reduces visibility
- 14. a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal.
- 17. a condition in which people in a building suffer from symptoms of illness
- 18. a region or layer of the atmosphere in which the temperature stops decreasing with elevation and instead becomes warmer
- 20. having a moderate amount of dissolved nutrients
- 21. a similar viscous mixture of liquid and solid component
- 22. the maximum concentration of a chemical that is allowed in public drinking water systems
- 23. rom the massive combustion of coal and fuel oil in or near the city
- 25. a group of bacteria that are passed through the fecal excrement of humans
- 28. secondary air pollutants formed by the action of sunlight on nitrogen oxides and reactive hydrocarbons
- 29. an organism that can live in an environment that offers very low levels of nutrients
- 32. type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides in the atmosphere.
- 33. any form of precipitation with acidic components
- 35. body of water formed from groundwater
- 36. well from which water flows under natural pressure without pumping.
- 37. contamination of water sources
- 39. mainly artificial structures
- 43. body of rock and/or sediment that holds groundwater
- 44. variation in temperature which causes tension in a material
- 46. the polluted form of water generated from rainwater runoff and human activities
- 47. process that takes away mineral components from saline water.
- 50. subsurface wastewater disposal facilities used to remove contaminants