What Are the Sources of Carbon Dioxide?
Vast underground reservoirs of CO2 exist naturally and are good sources of the substance. Many industries generate CO2 as a by-product of their processes, such as fertilizer (ammonia) and ethanol production. Burning fossil fuels also produces CO2. All these sources are suppliers for CO2 refineries that ultimately purify, dry and liquefy the CO2 gas. The substance, in its liquid form, is then marketed and distributed—for example, to restaurants and fast-food establishments for use in their fountain drink units—and to Hangers Cleaners™. Therefore, the CO2 that might otherwise have been released into the atmosphere becomes a valuable industry commodity.
