Today, cities around the world are becoming laboratories for a host of experiments in sustainable economic development. But will cities truly lead the way towards a green and sustainable future for this planet? And if they do, could all cities go green? This volume explores the “green city” concept from a global and interdisciplinary perspective. Contributions examine the conflicts inherent in eco-modernization—including issues relating to greenwashing, inequality, and justice—and the underlying power relations that shape twenty-first century ecological urbanism. Importantly, these pieces also investigate opportunities to respond meaningfully to urban environmental challenges. In so doing, they provide a space to consider new ways of thinking about green cities, and how to make them a reality in the future.