The catch lies in the blurry definition of what an eco-city actually is; what is appropriate, acceptable and ecologically responsible within a wide range of sustainability indicators? Globally, a question mark still hovers in clean technology circles over what is and what is not an eco-city. Indeed, how far must urban planners go in order to develop a metropolitan area with enough measures of sustainability to warrant recognition as an ecologically friendly area? The SSTEC is trying to tread this very wide line, to bridge the traditional urban industrial fossil-fuel-heavy model and the radically innovative concept of a zero carbon city. Unanimously, proponents of the SSTEC trumpet its green features, such as low household water consumption, large areas of public green space, and low per capita domestic waste generation. While the figures trumpeted by developers are by no means carbon neutral, and not nearly as high as expectations set by previous eco-city projects; their manageability make them attainable, and their presentation has made the entire Tianjin area incredibly sexy for investors and businesses looking to operate in the Bohai Economic Rim.