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Across
  1. 1. are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine.
  2. 5. is a type of radiation that is produced by the sun and some artificial sources, such as solariums.
  3. 7. is a chemical compound with the chemical formula CHâ‚„.
  4. 8. is a site for the disposal of waste materials
  5. 10. a substance that pollutes something, especially water or the atmosphere.
  6. 11. carbon dioxide is that portion of carbon dioxide in the atmosphere that is produced directly by human activities
  7. 16. form in the atmosphere through chemical and photochemical reactions from the primary pollutants
  8. 17. occurs when an excess of organic matter, such as manure or sewage, enters the water
  9. 21. are compounds of sulfur and oxygen molecules.
  10. 22. not essential minerals, or are toxic when in a certain form.
  11. 24. any single identifiable source of pollution from which pollutants are discharged, such as a pipe, ditch, ship or factory smokestack
  12. 25. are emitted directly into the air from sources.
  13. 27. the destruction of something, especially waste material, by burning.
  14. 29. refers to the use of source reduction and/or. environmentally sound recycling methods prior to energy recovery, treatment, or disposal of wastes.
  15. 30. is an inorganic molecule with the chemical formula O 3.
Down
  1. 2. capable of floating; that can be floated.
  2. 3. is caused by rainfall or snowmelt moving over and through the ground.
  3. 4. matter in particulate form.
  4. 6. It is the second layer of the atmosphere as you go upward.
  5. 9. any technique or method of minimizing the input of energy to an overall system by the exchange of energy
  6. 12. is a complex mixture of several pollutants.
  7. 13. are a group of gases that are composed of nitrogen and oxygen.
  8. 14. Recoverable materials that are organic in nature, such as plant material, food scraps, and paper products, can be recovered through composting and digestion processes to decompose the organic matter.
  9. 15. excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.
  10. 18. the release of radioactive substances or high-energy particles
  11. 19. is the process of converting waste materials into new materials and objects.
  12. 20. is a colorless, odorless, and tasteless gas that is slightly less dense than air.
  13. 23. a community that requires collection and transport to a processing or disposal site
  14. 26. are not particularly toxic, but are still a danger to the environment because they are used so extensively.
  15. 28. inefficient cooking and heating practices produce high levels of household