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The tonne of oil equivalent is used in energy accounting because it

  • A.avoids the need to know any calorific values
  • B.is defined by the Act as the only permitted unit
  • C.puts electricity and several fuels on one scale
  • D.is the unit in which every fuel is purchased

Answer: C

Coal in tonnes, gas in cubic metres, oil in litres and electricity in kilowatt hours cannot be added until they are converted, and the trading scheme's targets are denominated in this common unit. Each conversion needs the fuel's calorific value.

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