Density: New York
The surprise is that New York City is one of the most environmentally efficient cities on the surface of the planet because of its density. So density is not necessarily the enemy. It seems that suburban sprawl is the enemy.
Michael McDonough, Architect
Density offers hope: With nearly half of the world's population living in cities, density is increasingly becoming the global condition. The denser we make our cities, the more we can sustain ecosystems. Patrick Moore, Greenpeace cofounder