Environmental Systems

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Across
  1. 3. contamination of water
  2. 5. law to protect the water from pollution
  3. 7. the measure of relative clarity of a liquid
  4. 9. nitrogen and phosphorus, are added to bodies of water and can act like fertilizer, causing excessive growth of algae.
  5. 10. the introduction of harmful materials into the environment
Down
  1. 1. substance that pollutes the water or atmosphere
  2. 2. excessive richness of nutrients which causes a dense growth of plant life and death of animal life from lack of oxygen.
  3. 4. The reduction in the concentration of dissolved oxygen in water, especially as a result of pollution.
  4. 6. pollution sources that are diffused and without a single point of origin
  5. 8. made up of fine particles