Mick Pearce's design

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Across
  1. 2. to become lower in temperature
  2. 6. in the place of somebody/something
  3. 10. not harmful to the environment
  4. 11. an opening that allows air to pass out of or into a confined space.
  5. 12. A device or building that uses relatively little energy to provide the power it needs.
  6. 16. a level of a building
  7. 17. to make something become smaller, weaker, etc.
  8. 18. an area that is dark and cool under or behind something because the sun’s light does not get to it
  9. 19. to give somebody a job
  10. 20. the ability to be maintained at a steady level without exhausting natural resources or causing severe ecological damage
Down
  1. 1. an event, a discovery, an invention, etc. that marks an important stage in something
  2. 3. something that sticks out over something below, such as an upper part of a building, a roof, or a balcony.
  3. 4. used to introduce some new information that adds to or supports what you have said previously
  4. 5. a machine that creates a current of air
  5. 7. synonym of equipped
  6. 8. to give something to somebody or make it available for them to use
  7. 9. the ability of a material to absorb, store and release heat
  8. 13. with the purpose or intention of doing or achieving something
  9. 14. building material that is made by mixing together cement, sand, small stones and water
  10. 15. used to introduce a statement that contrasts with something that has just been said