Future of Society

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Across
  1. 3. the opposite of urban
  2. 5. a big gathering of buildings
  3. 6. the idea of taking care of yourself
  4. 7. when it's very hot for a period of time
Down
  1. 1. different forms of life together
  2. 2. your phone has one
  3. 4. a type of energy that doesn't run out