Sequestration of carbon dioxide, once captured at anthropogenic sources of production, is a measure to prevent increased atmospheric carbon dioxide concentration with its attendant greenhouse effect. This paper examines the value of carbon capture and sequestration, as well as the principal stages of this process. It proceeds to focus on one method of sequestration, the injection of carbon dioxide into aged oil wells in order to enhance recovery of oil, and provides examples of enhanced oil recovery in North America. Other information sources are provided for further information.