Carbonate rock is considered one of the major sources of carbon dioxide, capable of catalytic conversion to methane, synthetic natural gas (SNG), and other organic products. A brief account of various research reports available in the literature on the catalytic hydrogenation of carbon dioxide is included. Finally, carbon dioxide or, more specifically, carbonate rock is advanced as a potential source of products that might serve either as feedstocks for petrochemical industries or for production of energy.