11. a community that requires collection and transport to a processing or disposal site
13. the destruction of something, especially waste material, by burning.
15. occurs when an excess of organic matter, such as manure or sewage, enters the water
16. is a colorless, odorless, and tasteless gas that is slightly less dense than air.
18. any technique or method of minimizing the input of energy to an overall system by the exchange of energy
19. any single identifiable source of pollution from which pollutants are discharged, such as a pipe, ditch, ship or factory smokestack
22. 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.
23. a substance that pollutes something, especially water or the atmosphere.
24. inefficient cooking and heating practices produce high levels of household
26. is a type of radiation that is produced by the sun and some artificial sources, such as solariums.
28. are a group of gases that are composed of nitrogen and oxygen.
29. not essential minerals, or are toxic when in a certain form.
30. are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine.
1. are not particularly toxic, but are still a danger to the environment because they are used so extensively.
2. It is the second layer of the atmosphere as you go upward.
3. is a site for the disposal of waste materials
4. is an inorganic molecule with the chemical formula O 3.
6. 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.
7. is the process of converting waste materials into new materials and objects.
10. capable of floating; that can be floated.
12. are emitted directly into the air from sources.
14. form in the atmosphere through chemical and photochemical reactions from the primary pollutants
17. is a chemical compound with the chemical formula CH₄.
20. is caused by rainfall or snowmelt moving over and through the ground.
21. refers to the use of source reduction and/or. environmentally sound recycling methods prior to energy recovery, treatment, or disposal of wastes.
25. carbon dioxide is that portion of carbon dioxide in the atmosphere that is produced directly by human activities
27. the release of radioactive substances or high-energy particles