Erasmus ecology crossword

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Across
  1. 1. – a community of living and non-living things working together
  2. 3. gases – gases that make the Earth warmer
  3. 5. – cutting down too many trees
  4. 6. - the act of planting trees on an area of land that has become empty
  5. 9. – to make a waste product usable again
  6. 10. warming – the Earth getting hotter
  7. 12. resources – things we use from nature (like water, trees, oil)
  8. 13. – the variety of living things in a place
  9. 16. species – animals or plants that may disappear soon
  10. 17. – the natural home of a plant or animal
  11. 19. – chemicals used to kill pests on crops
  12. 20. layer – a layer in the sky that protects us from the sun
Down
  1. 1. – the natural world around us
  2. 2. – dirty the environment by releasing harmful chemicals or substances to the air, water, or land
  3. 4. – good for the environment; synonym of environment-friendly
  4. 7. – adjective that refers to something that is not new and has been owned or used by someone else before
  5. 8. fuels – coal, oil, gas – non-renewable energy sources
  6. 11. – using resources in a way that doesn’t harm the future
  7. 14. - materials that have no use and are unwanted
  8. 15. footprint – how much carbon dioxide someone produces
  9. 18. energy – energy from the sun, wind, or water