Songdo City’s green infrastructure and community planning set a new standard for sustainability. Walkable 15-minute neighborhoods encourage an active street life. Almost half of the city area is green space, while all parking is below grade. The vast Central Park, wind-powered sea-water canals, tree-lined streets, and green roofs make Songdo pleasant even in hot summers. KPF based Songdo on lessons learned from cities around the world, using comparative data on the scale, density, % of green and paved areas, width, and typology of streets.