Biogas does not contribute to increasing atmospheric carbon dioxide concentrations because the gas is not released directly into the atmosphere and the carbon dioxide comes from an organic source with a short carbon cycle.
O biogás non contribúe a incrementar as concentracións do dióxido de carbono atmosféricas porque o gas non se libera directamente á atmosfera e o dióxido de carbono procede dunha fonte orgánica cun curto ciclo do carbono.