Enzymatic processes in bacteria.Pollution of the environment by biological and technical waste

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Across
  1. 7. Breakdown of substances by microorganisms
  2. 8. The breakdown of organic matter
  3. 11. The set of life-sustaining chemical reactions
  4. 12. A protein that speeds up biochemical reactions
  5. 13. A poisonous substance produced by organisms
Down
  1. 1. A metabolic process producing energy
  2. 2. A harmful or unwanted substance in the environment
  3. 3. Contamination of the environment
  4. 4. Use of microbes to clean pollution
  5. 5. Microorganisms involved in enzymatic processes
  6. 6. A chemical reaction involving oxygen
  7. 9. A microscopic organism, including bacteria
  8. 10. Unwanted or discarded material