fossil fuel vs fume

fossil fuel

noun
  • Any fuel derived from hydrocarbon deposits such as coal, petroleum, natural gas and, to some extent, peat; these fuels are non-renewable, and their burning moves carbon from underground into the atmosphere via the greenhouse gas carbon dioxide. 

fume

noun
  • A material that has been vaporized from the solid or liquid state to the gas state and re-coalesced to the solid state. 

  • Anything unsubstantial or airy; idle conceit; vain imagination. 

  • Rage or excitement which deprives the mind of self-control. 

  • The incense of praise; inordinate flattery. 

  • A gas or vapour/vapor that is strong-smelling or dangerous to inhale. 

verb
  • To apply or offer incense to. 

  • To expose (something) to fumes; specifically, to expose wood, etc., to ammonia in order to produce dark tints. 

  • To pass off in fumes or vapours. 

  • To be as in a mist; to be dulled and stupefied. 

  • To express or feel great anger. 

  • To emit fumes. 

How often have the words fossil fuel and fume occurred in a corpus of books? (source: Google Ngram Viewer )