STARKVILLE, Miss. — Carbon dioxide is the most commonly produced greenhouse gas, the substances that trap heat in the atmosphere keeping the planet warm enough for life. Carbon is stored in high amounts in timber, of which Mississippi has an abundance. The state ranks in the top 10 nationally in timber production, with close to 20 million acres of timberland. The U.S. Geological Survey says that carbon sequestration is the process of capturing and storing atmospheric carbon dioxide. Removing carbon dioxide from the atmosphere reduces the potential for global climate change. Since timber stores carbon efficiently, a tremendous amount of the greenhouse gas carbon dioxide is stored in Mississippi’s forests. This makes timber a valuable resource in efforts to limit the amount of carbon available as a greenhouse gas. Carbon credits and the carbon offset market have made an impact on Mississippi’s economy to a degree for about 20 years.