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Laboratory of Energy Systems, EPFL
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The interest in developing biofuels has rapidly increased during the last decades followed by a strong controversy about their sustainability. Diverting a large amount of land from agriculture to fuels, impacting forests and grasslands, loss of biodiversity due to large monocropped fields are some threats that inhibit the momentum towards a significant substitution of fossil fuels by biofuels. From a methodological point of view, several estimations of the reduction of greenhouse gas (GHG) emissions from biofuels lead to a large variability of results even if they address the same biofuel pathway. This paper aims at investigating the main assumptions made in the literature when estimating the reduction of GHG emissions of biofuels in comparison with their fossil competitors.
