Oops! My spelling is pretty lousy.
1. wool should be wood.
2. yes, for example, "they developed alternative fuels for aircraft."
3. point taken.
4. yes, see the definition below:
chimney - chimney [ˈtʃɪmnɪ]
n
1. (Miscellaneous Technologies / Building) a vertical structure of brick, masonry, or steel that carries smoke or steam away from a fire, engine, etc.
Reference: http://www.thefreedictionary.com/chimney
Thanks for your feedback!
