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Environment

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Across
  1. 1. Mixture of decaying organic matter
  2. 6. The wave energy released by earthquakes
  3. 7. Extended period of no water
  4. 8. Any substance that evaporates quickly
  5. 12. Substance that repels or kills plant or animal pests
  6. 13. Largest plant family
  7. 15. Offspring of male donkey and female horse
  8. 16. Chemical substance contained in all plants and animals
  9. 18. Area designated to receive household garbage
Down
  1. 2. Bird which lays the largest egg
  2. 3. System comprising ecosystems and organisms
  3. 4. Fastest cat in the world
  4. 5. The worlds cleanest country
  5. 6. Mixture of smoke and fog
  6. 7. The driest biome
  7. 8. Opening in the earths crust from which lava flow
  8. 9. The worlds largest biome
  9. 10. Most abundant element found in air
  10. 11. Sweet liquid inside a flower
  11. 14. Destruction of forests
  12. 16. Substance that makes plant green
  13. 17. Underground layer of water-bearing permeable rock