According to the U.S. Census Bureau 80.7 percent of the U.S. population lived in urban areas as of the 2010 Census. While urban growth improves the quality of life, and makes modern services and amenities accessible to everyone, it also raises significant challenges for urban planning.
“Explosive growth of cities globally signifies the demographic transition from rural to urban, and is associated with shifts from an agriculture-based economy to mass industry, technology, and service. For the first time ever, the majority of the world’s population lives in a city, and this proportion continues to grow. ” (databank.worldbank.org)