Solar energy crossword 4

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Across
  1. 3. decrease in size, extent, or range
  2. 6. process of withdrawing, pulling out
  3. 9. easy to approach; obtainable
  4. 11. to put together
  5. 13. to make less severe
  6. 16. usual
  7. 17. the process of burning
  8. 18. to increase; to strengthen or deepen
Down
  1. 1. to purify
  2. 2. to give off
  3. 4. dangerous
  4. 5. put into use; utilize
  5. 7. to put in place or set up
  6. 8. the work that is done to keep something in good condition
  7. 10. an amount beyond what is required
  8. 12. able to be created again
  9. 14. to bring back
  10. 15. different; varied