Environmental dominoes

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Across
  1. 5. | The act of getting rid of something
  2. 7. | Animals and plants that live in the ocean or sea
  3. 8. | A significant event or stage in life/development
  4. 9. | Chemicals used to kill pests
  5. 10. | Not enough of something; limited supply
  6. 11. | In limited supply
Down
  1. 1. | The presence of harmful substances or pollution
  2. 2. | Illegal dumping of waste
  3. 3. | Poisonous or harmful to living things
  4. 4. | Water located under the Earth’s surface
  5. 6. | A machine that burns waste