FEN FUEL is a type of fuel made from PEAT, which is a type of organic matter found in wetlands. PEAT is composed of partially decayed plant material and is harvested for use as fuel. FEN FUEL is created by drying and compressing the PEAT into briquettes or pellets, which can then be burned as fuel. It is a renewable energy source and is often used in rural areas where other sources of fuel are not available.