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‘Curb CO2 emissions’ is a common expression today and it will be heard even more frequently in the future. Biofuels have attracted attention for many years, and recently this attention has been directed, in particular, to biofuels in heavy‐duty vehicles. This sector contributes to a significant quantity of emissions in Brazil. This class of fuels – biodiesel, fatty acid methyl esters (FAMEs) – has...