Natural Resources Crossword

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Across
  1. 3. The water & human wastes that are washed down sinks, toilets, and showers
  2. 4. A form of oxygen that has three oxygen atoms in each molecule instead of the usual two
  3. 7. A type of pollution caused by factories & power plants releasing superheated water into natural bodies of water
  4. 9. A rate of change that increases more and more rapidly over time
  5. 10. A resource that is either always available, or is naturally replaced in a relatively short time
  6. 12. A widely-spread source of pollution that is difficult to link to a specific point of origin
  7. 15. The practice of allowing renewable resources time to recover and replenish
  8. 16. Pollutants that are released into the air
  9. 17. The process by which water, ice, wind, or gravity moves weathered particles of rock or soil
  10. 20. The practice of using less of a resource so that it can last longer
  11. 21. The advance of desert-like conditions into areas that were previously fertile
  12. 22. The number of people born per 1,000 individuals over a certain period of time
  13. 26. Energy-rich substances formed from the remains of organisms
Down
  1. 1. The number of deaths per 1,000 individuals over a certain period of time
  2. 2. Contamination of Earth's land, water, or air through the release of harmful substances into the environment
  3. 5. Abnormal rain that is caused by the release of sulfur dioxide & nitrogen oxide into the air
  4. 6. Small, solid pieces of material that come from rocks or the remains of organisms
  5. 8. A natural resource that is not replaced in a useful time frame
  6. 11. Anything naturally occurring in the environment that humans use
  7. 13. A process that removes salt from sea water to make fresh water
  8. 14. The splitting of an atom's nucleus into two nuclei, which releases a great deal of energy
  9. 18. To form a crystal structure
  10. 19. A condition in which the number of humans grows beyond what the available resources can support
  11. 23. A mineral deposit large enough and valuable enough to be extracted from the ground
  12. 24. Using a resource in ways that maintain it at a certain quality for a certain period of time
  13. 25. A specific source of pollution that can be easily identified