Would residue make a good fuel?

Yes, residue can make a good fuel, particularly in the form of biomass or waste materials. Residues from agricultural processes, such as straw or wood chips, can be converted into biofuels through various methods, including combustion or anaerobic digestion. Additionally, some industrial residues, like those from food processing, can be repurposed for energy production, reducing waste and providing a renewable energy source. However, the efficiency and sustainability of using residue as fuel depend on the specific type and its processing methods.