Erasmus ecology crossword puzzle

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Across
  1. 3. – natural resources
  2. 7. - reforestation
  3. 9. - carbon footprint
  4. 12. – renewable energy
  5. 13. – pesticides
  6. 15. - biodiversity
  7. 16. - global warming
  8. 17. –ecosystem
  9. 18. – second-hand
  10. 19. - endangered species
Down
  1. 1. – ozone layer
  2. 2. – recycle
  3. 4. - environment
  4. 5. - waste
  5. 6. – fossil fuels
  6. 8. – eco-friendly
  7. 10. - greenhouse gases
  8. 11. - habitat
  9. 14. – pollute
  10. 20. - sustainable