What do you understand by term fuel substitution ? give example?
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he maximum road transportation fuel substitution through biomass is usually considered around 8% of present gasoline and diesel consumption if production of biofuels were restricted to 10% of agricultural land . It is difficult to assess today the availability of land for energy crops or biofuels by the year 2020 or beyond, and it should be borne in mind that several crops (rape, wheat, etc.) have a higher energy content than what is used for the biofuel and thus offers a broader renewable energy perspective than motor fuel substitute.
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