Water pollution

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Across
  1. 2. One of the most clearest water source in Latvia
  2. 4. You need to...the water if it semms unclean
  3. 6. The most toxic heavy metal
  4. 7. Place where is the most pulluted river in the world
  5. 9. What you can`t throw idown the drain
  6. 10. rain Substance which has a pH of below 6.5
Down
  1. 1. Substance which pollutes see, oceans, rivers(often from ships)
  2. 3. Process by which a body of water acquires a high concentration of nutrients, especially phosphates and nitrates.
  3. 5. Sources discharge pollutants at specific locations through pipelines or sewers into the surface water. (factories, sewage treatment plants, underground mines, oil wells, oil tankers and agriculture).
  4. 6. A disease that is caused by bacteria that is spread through water contaminated by faeces from an infected person.
  5. 8. Water pollution type when it is only on the upper layer