Chemical weapons

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Across
  1. 2. a weapon that was commonly used in ww1 and ww2
  2. 4. Use for heating homes and cooking
  3. 5. substances designed to control, repel, or kill pests
  4. 7. a scientific names for things that are powder
Down
  1. 1. Air from something burning
  2. 3. a gas that sounds like a type of sauce
  3. 6. Toxic substance that causes cancer
  4. 8. Something that is very harmful, poisonous