How can we fit more people into cities without overcrowding? Kent Larson shows off folding cars, quick-change apartments and other innovations that could make the city of the future work a lot like a small village of the past.

Cities account for 70% of global emissions: how they are designed, constructed, managed, and powered will lock in behavior, lifestyles, and future urban greenhouse gas emissions. Using the MIT-Kendall Square district of Cambridge as a case study, Kent Larson presents a series of urban interventions that could dramatically reduce emissions while ...