NOVELTY - Production of carbon suboxide or polymeric carbon suboxide either involves reacting (M1) an organic substance or carbon with water, oxygen, or carbon dioxide at an elevated temperature and/or pressure, to produce carbon suboxide; or reacting (M2) carbon or hydrocarbon with oxygen or water in the presence of nonequilibrium plasma to produce at least carbon suboxide and hydrogen.    USE - For producing carbon suboxide or polymeric carbon suboxide i.e. humic acid or humus used as an organic fertilizer or soil conditioner; for producing fibers; for producing electricity from an organic substance or carbon; for carbon dioxide sequestration and carbon dioxide storage (claimed).    ADVANTAGE - The methods involve the formation of carbon suboxides and/or polymerized carbon suboxides (PCS), preferentially over gaseous carbon oxides to thereby reduce gaseous carbon dioxide emissions. The methods can be employed for efficient generation of energy and/or hydrogen. Hydrogen is released from a hydrocarbon source while at the same time, reducing the production of gaseous carbon oxides by the preferential production of polymerized carbon suboxides.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) producing fibers (m2) involving reacting at least one material selected from carbon or a hydrocarbon with a compound selected from oxygen and water in the presence of nonequilibrium plasma or elevated temperature, pressure, or any combination of these three parameters, to produce polymeric carbon suboxide; and heating the polymeric carbon suboxide in the absence of oxygen to drive out at least some oxygen from the polymeric carbon suboxide to produce carbon rich fibers;    (2) method of electricity production (m3) from an organic substance or carbon, involving converting the organic substance or carbon into a condensed product by reacting the organic substance or carbon with water, oxygen, or carbon dioxide at an elevated temperature and/or pressure, to produce carbon suboxide; and oxidizing hydrogen in a fuel cell.