The term Greenfield in the context of energy markets is described to define markets that are at their initial stages of development. A Greenfield market in the natural gas economy would thus be one with a limited number of gas suppliers, few consumers, not fully developed infrastructure (such as transmission and distribution systems), lack of experience, lack of a body of professionals, a dearth of relevant legislation, etc. At the other end of the spectrum we have a mature market place or a brownfield