Forests: Earth's Green Lungs & Ultimate Carbon Sink Solution

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Across
  1. 2. To make a problem or bad situation worse.
  2. 3. Process plants use to convert light energy into chemical energy, using CO2.
  3. 4. To make something bad less severe or painful.
  4. 6. A biological community of interacting organisms and their physical environment.
  5. 7. Green with grass or other rich vegetation.
  6. 10. Clearing of trees, transforming a forest into cleared land.
  7. 12. Of considerable importance, size, or worth.
  8. 13. Total mass of organisms in a specific area.
  9. 14. A large natural or artificial store of a substance.
  10. 16. More important than anything else; supreme.
  11. 18. A person or thing vital to an enterprise.
  12. 19. Complex organic polymer in cell walls, making wood rigid.
  13. 20. The action of becoming larger or more extensive.
Down
  1. 1. The action of taking legal possession of assets until a debt has been paid or other claims have been met (in this context, the trapping of carbon).
  2. 5. Relating to the Earth or land.
  3. 8. Main constituent of plant cell walls, an organic compound.
  4. 9. Extremely large or great; immense.
  5. 11. The responsible overseeing and protection of something considered worth caring for.
  6. 15. A natural reservoir that accumulates carbon.
  7. 17. Process in living organisms involving energy production, often with intake of oxygen and release of CO2.