Water pollution

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Across
  1. 3. The process by which organic substances are broken down into simpler matter.
  2. 6. Loss of water-soluble plant nutrients from the soil, due to rain and irrigation.
  3. 9. The enrichment of a water body of nutrients usually with an excess amount of nutrients.
  4. 10. The amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.
Down
  1. 1. When there is no single identifiable source of air, water, thermal, noise or light pollution.
  2. 2. Watertight chamber made of concrete fiberglass ,PVC or plastic.
  3. 4. Water present beneath earth's surface in soil pore spaces and in the fractures of rock formations.
  4. 5. A single identifiable source of air, water, thermal or noise pollution.
  5. 7. Types of pollutants; Lead, mercury & arsenic
  6. 8. An example of an indicator disease.