A method comprising administering an oligosaccharide composition to an organism having a gastrointestinal system to affect the production of GHG produced by the organism allowing for a reduction of the GHG produced by the organism while optimizing the health, feed intake, and protein synthesis of the organism so that management of the organism may realize the synergistic effects of maximizing both typical organism commodity-type concerns (e.g., size and production metrics) and atypical organism commodity-type concerns (e.g., carbon credit trading/monetization). A gas-reducing composition comprising soluble extractable material from a lignocellulosic source. A method of producing a composition, comprising providing a lignocellulosic source; extracting soluble materials from the lignocellulosic source to produce soluble extractable material; and processing the soluble extractable material to yield a gas-reducing composition, wherein the gas-reducing composition comprises hemicellulose and exhibits gas-reducing activity.