NOVELTY - Clean burning bio-coal comprises bio-fiber material and coal material. The bio-fiber material is present at 70-90 wt.% of a total weight of the bio-coal, and the coal material is present at 1-20 wt.% of the total weight of the bio-coal to enable production of total heat energy high enough to satisfy requirements in industrial activities.    USE - Used as a clean burning bio-coal.    ADVANTAGE - The clean burning bio-coal: is environment-friendly; has fully blended and uniformly distributed components; provides environmental protection through recycling agricultural wastes and reducing the emission of greenhouse gases e.g. carbon dioxide and sulfur dioxide and pollution gases e.g. nitrogen oxide compounds, during burning; produces total heat energy high enough to satisfy requirements in industrial activities; enables complete combustion and has a high burn-out rate as high as 97.8%; is energy saving; produces total heat energy no less than 5000 Kcal/kg to meet the requirements in warming, cooking and other industrial activities; provides less than 1% of the emission of carbon dioxide and sulfur dioxide, which complies with the related international standard; provides emission concentration of nitrogen oxide compounds not higher than 100 mg/m3; provides emission concentration of combustible dust which does not exceed 100 mg/m3; and provides bio-fiber material having alkaline calcium ions which can fully react with acidic sulfur ions in the coal material to produce solid ashes, instead of reacting with oxygen atoms to produce sulfur dioxide.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a clean burning bio-coal comprising bio-fiber material and coal material, where alkaline calcium ions in the bio-fiber material fully react with acidic sulfur ions in the coal material to produce solid ashes, instead of reacting with oxygen atoms to produce sulfur dioxide, so that emission of greenhouse gases and pollution gases during burning of the bio-coal is reduced; and    (2) a clean burning bio-coal comprising bio-fiber material and coal material that are fully blended with each other, where when the bio-coal burns, it is the bio-fiber material that burns out first to produce a burning porous briquette, which enables an increased burn-out rate of the bio-coal.