Think green

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Across
  1. 3. rotting food scraps in soil
  2. 5. converting waste into reusable material
  3. 7. introduction of harmful substances into the environment
  4. 9. 10 years
  5. 10. a sudden violent shaking of the ground
  6. 11. respectful of the environment
Down
  1. 1. a synthetic material made from polymers
  2. 2. a person concerned about protecting the environment
  3. 4. unwanted or unusable material, substances or by-products
  4. 6. the state or process of disappearing/vanishing
  5. 8. the weather of a place over a long time