Bread waste could become a sustainable fuel. The University of Pisa's research offers up new opportunities for biofuel production, addressing two of the circular economy's most serious challenges: the urgent need for a transition to renewable energy sources and the growing problem of food waste. The work, published in the Journal of Environmental Chemical Engineering, takes advantage of a highly abundant waste product: bread scraps from large-scale retail shops, which frequently require costly disposal. Bread scraps are now converted into a molecule that can serve as an excellent solvent, intermediate, and biofuel that can be added to both diesel and gasoline without significantly affecting engine performance and even reducing harmful emissions. It is a method for reducing the usage of fossil fuels without changing existing engines.