Charcoal grills use either charcoal briquettes or natural lump charcoal as their fuel source. Heating was provided by stoves burning charcoal briquettes. Sawdust is used in the manufacture of charcoal briquettes. Charcoal briquettes contain many additives that can contaminate the flavor. Charcoal briquettes are still used for traditional or outdoor cooking. For home use of granulated incense, small, concave charcoal briquettes are sold. Henry Ford used wood scraps from the production of Model Ts to make charcoal briquettes. In Ireland, peat briquettes are used as smokeless fuel. It can be used both with lump charcoal and briquettes. The city has cottage industries producing rattan furniture, coconuts, and charcoal briquettes. It can be burned directly, or processed further into pellets or briquettes. This lump charcoal was modified and pressed into briquettes and mass marketed by Ford. Home made charcoal briquettes (called ') were found after charcoal production in Japanese history. Use of biomass briquettes can earn Carbon Credits for reducing emissions in the atmosphere. The former carbonaceous fuels are usually supplied in the form of standard shaped briquettes.