The environment

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Across
  1. 2. A word is synonym of people
  2. 3. A chemical to kill harmful insects, wild plants
  3. 6. The streams will be ... with foam
  4. 9. To reduce something to the least possible level
  5. 11. To make something become smaller in size, amount, degree, ect.
Down
  1. 1. A word is synonym of precious
  2. 4. A type of explosive
  3. 5. A word is synonym of hedge
  4. 7. A piece of land full of rubbish
  5. 8. A flow of water
  6. 10. ... of bubbles of air or gas