Currently, about 50% of the world's population resides in cities, and this number is expected to increase to 70% in the near future. As a result, we desperately need innovative solutions to problems caused by urban sprawl, and we require new technologies that can address environmental, energy, and human health issues.The Green City Technology Institute is spurring research for improving the urban sustainability and the quality of life, hopefully resulting in the formation of global platform for implementing innovative technologies to manage effectively the urban water cycle, energy, and emerging environmental contaminants.