UNIT 7 - POLLUTION

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Across
  1. 2. to get rid of something you do not want,
  2. 4. a substance that pollutes something, especially air and water
  3. 5. water that is found under the ground in soil, rocks, etc.
  4. 8. a chemical that is poisonous to plants, used to kill plants that are growing where they are not wanted
  5. 9. to make the meaning of something clearer by using examples, pictures, etc.
  6. 10. a substance that can make people or animal ill or kill them if they eat or drink it
  7. 11. a piece of soft material that you put into your ear to keep out noise or water
  8. 12. connected with heat
Down
  1. 1. growing or living in, on or near water
  2. 3. to make a substance or place dirty
  3. 6. a chemical used for killing pests, especially insects
  4. 7. lasting forever