Taylor Morel

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Across
  1. 1. add water to gasses to help remove pollutants
  2. 2. precip that contains high amounts of acid
  3. 6. harmful substances that are added
  4. 8. build-up of toxic substances in a food web
  5. 9. measures how acidic or basic a substance is
  6. 10. remove dust from smokestacks
Down
  1. 1. a set of symptoms that may affect workers in a building
  2. 3. tiny and solid
  3. 4. lets gas through, but not solids
  4. 5. affects human health and the quality of life
  5. 7. one that is put directly into the air
  6. 11. no2 and co2