A United Nations study cites Bogotá, Havana, Mexico City, Quito, and Rio de Janeiro as examples of cities seeing a proliferation of shantytowns.
ÜRO on korraldanud uuringuid Bogotás, La Habanas, Méxicos, Quitos ja Rio de Janeiros, kus on toimunud kiire hurtsikulinnade kasv.