Araphy

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Across
  1. 3. Conservationist protests for protection of nature
  2. 6. Outside earths atmosphere
  3. 8. surprisingly small
  4. 9. dense population
  5. 12. thing made by humans
  6. 13. exact
  7. 16. policy makers
  8. 17. eating and drinking
  9. 18. scientific knowledge
Down
  1. 1. home
  2. 2. eco friendly
  3. 4. deny
  4. 5. almost practical
  5. 7. help
  6. 9. study of nature
  7. 10. examining something
  8. 11. Emission release
  9. 13. less water
  10. 14. Aspects of mechanical air-craft
  11. 15. unexpected meetings with stuff