This report is intended to answer the question: "What international experiences with 'eco-cities' can help the central Chinese government evaluate the performance of Chinese cities that pursue 'lowcarbon' urban development?" To answer this question, we reviewed the literature on eco-cities and closely related concepts, surveyed performance indicators used to evaluate sustainable urban development around the world, and compiled case studies of exceptional eco-and sustainable cities.Part I of this report describes our review of urban planning, architecture, urban studies, and civil engineering literature. The goal of this review was to determine how theorists and advocates have used the term "eco-city" and similar concepts throughout the past 150 years and to identify other terms and concepts used to describe eco-cities and characteristic eco-city features.Part II of this report looks at the performance indicators that governments, institutions, academics, and citizens are using to evaluate the sustainability or "green" performance of urban developments. This section of the report identifies, to the extent possible, themes and indicators that are common among the indices used to evaluate cities.