Biofuel greenhouse gas calculations under the European Renewable Energy Directive - A comparison of the BioGrace tool vs. the tool of the Roundtable on Sustainable Biofuels

► We compare tools for biofuel CO2 calculations under the Renewable Energy Directive. ► Results for the same biofuel differ up to 21% between tools. ► Hence a producer can enhance the CO2 performance by 21% by using a different tool. ► Reasons: differences in background data and calculation of fertiliser N2O-emissions. ► Shows a regulatory gap: need for specification of method in current legislation.