10. Environment & Pollution

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Across
  1. 2. the area where an animal normally lives or a plant grows
  2. 4. an event, thing, or person that makes something happen
  3. 7. the air around the Earth or another planet
  4. 8. enough
  5. 14. using something incorrectly and dishonestly
  6. 15. to live in a place
  7. 17. harm or injury
  8. 18. lacking the correct amount of something
  9. 19. to remove something
  10. 22. a guilty and embarrassed feeling
  11. 24. to throw something away
  12. 26. a chemical substance with a pH value of less than 7
  13. 29. to become worse in some way
  14. 30. to use something up completely
  15. 32. a person's or animal's natural surroundings
  16. 34. not mixed with something else; clean and clear
  17. 35. to treat waste materials in order to use again
  18. 37. making a place or thing dirty or impure
  19. 38. to send something out into the air
  20. 39. to keep someone or something from being harmed
  21. 41. not sufficient; not enough
  22. 42. to get rid of something when you don't want it
  23. 43. a hole or crack that liquid or gas can escape through
  24. 44. a very bad accident such as an earthquake or flood
  25. 46. to find the answer to a problem
  26. 49. using something more often than necessary
Down
  1. 1. showing careful thought
  2. 3. chemicals used for killing insects
  3. 5. to make something dirty or harmful
  4. 6. chemicals that farmers use to kill harmful insects
  5. 9. a large area where trees grow close together
  6. 10. all the plants and animals in a particular area
  7. 11. a particular type of liquid, solid, or gas
  8. 12. to consider how things and people are different or similar
  9. 13. waste material that you are throwing away
  10. 16. not definite; vague
  11. 18. to remove the trees from an area of land
  12. 20. poisonous and harmful
  13. 21. to use something more than you need to
  14. 23. to cause someone or something danger
  15. 25. to keep or move apart
  16. 27. to grow or become more advanced
  17. 28. firm and clear
  18. 31. needing great care; easily damaged or broken
  19. 33. to form something or be part of it
  20. 36. a large hole in the ground where waste is buried
  21. 40. to arrange for something to continue
  22. 45. to let something fall out of a container by accident
  23. 47. the study of living things in their surroundings
  24. 48. to spoil something or to make someone feel sad