Earth Day Crossword Puzzle

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Across
  1. 1. trash that is left lying in an open or public place.
  2. 4. produced without the use of chemical fertilizers, pesticides, or other artificial agents
  3. 9. can be used again and again.
  4. 14. a substance that is harmful or has poisonous effects on the environment.
  5. 15. an arrangement between people to make a regular trip in a single vehicle instead of each person in their own vehicle. Typically each person takes turns to drive the others on different days.
  6. 16. to use something as little as possible instead of continuously; to prevent something from being changed or destroyed.
  7. 17. one of the four spheres of earth that includes all life on earth
  8. 21. the production and discharge of gases into the atmosphere, especially from factories or machines (such as cars and trucks).
  9. 23. no living members of a species remain
  10. 24. the natural world as a whole; the surroundings or conditions in which a person, animal, or plant lives.
  11. 26. to convert or reprocess materials so that they can be used again
  12. 27. any gas, especially carbon dioxide, which contributes to the greenhouse effect by absorbing infrared radiation.
  13. 29. the natural organisms, flora, and fauna that constitute and sustain a particular area.
  14. 31. keep in safety and protect from harm, loss, or destruction
  15. 32. to not develop or change something so as to maintain it in its existing state.
  16. 33. the impression left by a foot or shoe on the ground or a surface
  17. 34. an increase in the temperature of the Earth’s atmosphere, which is due to the greenhouse effect.
  18. 35. a very large expanse of sea
  19. 36. material that is not wanted; the unusable remains or byproduct of something
  20. 37. The name of our planet. The third planet from the sun.
Down
  1. 2. seriously at risk of extinction.
  2. 3. the trapping of the sun’s heat in the atmosphere caused by greenhouse gases
  3. 5. the weather conditions in an area.
  4. 6. large woody plants of considerable height and branches that remove CO2 from the atmosphere.
  5. 7. a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis
  6. 8. one of the four spheres of earth that includes all the water on earth
  7. 10. harnessing of the Sun’s energy to generate electrical power.
  8. 11. decaying organic material used as a plant fertilizer.
  9. 12. one of the four spheres of earth that includes all the air on earth
  10. 13. a synthetic material that take a very long time to degrade.
  11. 18. the action of clearing a wide area of trees.
  12. 19. the native animals of a region.
  13. 20. to use something again more than once
  14. 22. the physical world collectively, including plants, animals, the landscape, and other features of the planet Earth that are not human creations.
  15. 25. decayed organic material used as a plant fertilizer.
  16. 28. maintaining an ecological balance by avoiding the depletion of natural resources.
  17. 30. fuel such as coal and oil that is formed naturally over many years from the remains of animals and plants.