U.S. Cities Factsheet | Center for Sustainable Systems
Large, densely populated, and bustling with activity, cities are cultural and economic centers, providing employment, leisure, and educational opportunities. Energy and resources flow in and out to support population and infrastructure. However, there is increasing attention on the environmental impacts of cities, and the significant opportunities to reduce the impact of the built environment and improve the livelihoods of urban residents.| Center for Sustainable Systems
