People who fuel up with diesel or gasoline sometimes don’t even know that it contains biofuel. This is because small portions of biofuel do not have to be declared. Biogenic fuels account for almost 7% (diesel) and nearly 3% (gasoline) of the fuel sold in Switzerland. In the coming years, they could make a growing contribution to reducing greenhouse gas emissions in the mobility sector. This is thanks to their biogenic origin, but also to efficiency improvements in adapted engines. This is shown in a new study by a team of researchers from the Swiss Federal Institute of Technology Zurich (ETHZ) and the Swiss Federal Laboratories for Materials Testing and Research (Empa).