Earth day puzzle

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Across
  1. 3. Could be used again
  2. 4. Making something that is not useful again
  3. 6. How much people have created and invented better things
Down
  1. 1. Making something that is not useful, useful again
  2. 2. able to be maintained at a certain rate or level
  3. 4. Using something again
  4. 5. The weather
  5. 7. The third planet from the sun