All Wood and Dung Fuels

The oldest household fuels, namely firewood, which is any wooden material that can be burned, and dry dung fuel, the dried manure of domestic animals used for cooking and heating where other fuels are scarce. A source belongs here when its cited article describes a solid fuel gathered from plants or animals and burned with little or no processing. It excludes charcoal and modern wood pellets, and it is kept separate because both fuels are gathered locally by households rather than sold through fuel markets.