Environmental Engineering

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Across
  1. 3. something or someone famous and admired by many people; is thought to represent something of importance
  2. 5. something that is easy to recognize, such as a tall tree or building, and that helps you know where you are
  3. 9. for a particular purpose or in a particular situation
  4. 11. the quality of doing something well and effectively, without wasting time, money, or energy
  5. 13. to improve the way something is done or used so that it is as effective as possible
  6. 14. the gas produced when an engine is working
  7. 16. connected with beauty and the study of beauty
  8. 17. the central and most important part of an area, system, or activity that all of the other parts are connected to
Down
  1. 1. not easily noticed
  2. 2. to make a good combination with someone or something else
  3. 4. in a general way, relating to the main facts rather than the details
  4. 6. a very small creature that lives in plants or carpets
  5. 7. to improve a machine or building by putting new and better parts in after it has been used for some time
  6. 8. an important plan or process to achieve a particular aim or to solve a particular problem
  7. 9. a ball shape
  8. 10. works well and is the result of clever thinking and new ideas
  9. 12. to get rid of something, especially something that is difficult to get rid of
  10. 15. something that makes a place comfortable or easy to live in