Crossword

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Across
  1. 2. not doubted
  2. 3. material used to kill insect
  3. 6. material used in the ground to support plant growth
  4. 7. to cause to come to an inevitable bad end
  5. 8. to kill by preventing access of air
Down
  1. 1. a furnace to burn waste
  2. 4. in a serious way
  3. 5. carried out without delay