This is maybe most important of the advantages of biomass energy. Biomass is a part of the carbon cycle. Carbon from the atmosphere is absorbed into plants during photosynthesis and when the plant decays or is burnt that carbon goes back into the atmosphere. Because it is a cycle, the next crop of plants absorb that carbon over again, so there is a balance between the amount of carbon that the biomass fuel release into the atmosphere and the amount that they extract from it. This is why biomass fuels do not contribute to global warming. Biomass fuels are clean.