Collapse of Early Civilization - SUS324

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Across
  1. 1. Roman authorities focused more on war than the overall _____ of their citizens (6)
  2. 6. A possible X-Files esque explanation for the statues (6)
  3. 9. Rome and Tikopia, as an example (12)
  4. 11. One of the environmental problems facing us today, like habitat destruction (13)
  5. 12. One of the environmental problems facing us today: erosion, salinization and ____ fertility losses (4)
  6. 13. The environment of Tikopia (8)
  7. 14. A sector that continued to grow and led to the eventual downfall of both civilizations (8)
  8. 16. Man made or natural, either way a threat to all civilization (2 words - 7, 6)
  9. 17. One of the main wonders of Tikopia (7)
  10. 18. ____ of the Commons (7)
  11. 20. Waste management, was not great in ancient Rome (8)
  12. 21. The building blocks of civilization, what is necessary to make anything (9)
  13. 24. One of the environmental problems facing ancient Rome, also knowing as mining (8)
  14. 27. Rules that a civilization abides by, cannot be broken without serious consequences (4)
  15. 32. Environmentalist we discussed, last name is the April birthstone (2 words - 5, 7)
  16. 34. Earth is a closed environment with ____ resources (6)
  17. 35. The state of Tikopia, synonymous with secure (6)
  18. 36. Strong _____ made fruit on Tikopia fall before they were ripe (5)
  19. 37. Both Rome and Tikopia ___ because of environmental disaster (4)
  20. 38. Number of environmental problems facing us today, according to Jared Diamond (6)
Down
  1. 2. One of the civilizations we talked about, collapsed (2 words - 6, 6)
  2. 3. The Roman goddess of wisdom and battle strategy (7)
  3. 4. ____ for the future and long-term thinking is extremely important moving forward (8)
  4. 5. The Roman god of war (4)
  5. 7. Factors like overpopulation, economic disruption and political struggles (8)
  6. 8. The ability to be sustained, supported, upheld, or confirmed OR The quality of not being harmful to the environment or depleting natural resources, and thereby supporting long-term ecological balance (14)
  7. 10. One of the environmental problems facing us today (14)
  8. 15. Oceans were too cold for coral reefs, leading to a lack of ____ (4)
  9. 19. Factors like war, drought, natural disaster and disease (8)
  10. 22. Both civilizations ______ all of their resources (9)
  11. 23. The main source of freshwater, not all too common on Tikopia (4)
  12. 25. One of the civilizations we talked about, collapsed (4)
  13. 26. One of the civilizations we talked about, sustained itself for thousands of years (7)
  14. 28. What Rome used most of its resources for (3)
  15. 29. One of the most in demand resources (6)
  16. 30. Jared Diamond's ____ factors of collapse (4)
  17. 31. Lessening of the ability of the economy and/or technology to meet the needs of the population (7)
  18. 33. One potential factor that could cause the collapse of a civilization, like the Bubonic Plague (7)