Historically, city-dwellers have been a small proportion of humanity overall, but following two centuries of unprecedented and rapid urbanization, more than half of the world population now lives in cities, which has had profound consequences for global sustainability.
Daɣ attarex, imazzaɣan win iɣirman aqqalan takbizzet andarrat daɣ alɣalim fuk net mušan daɣ issin afdan n awatay s kala war ijjen daɣ tarmad tamazduq tan ighirman, a ojjaran tazune n išaɣib wan alɣalim izzaɣan daɣ iɣirman,harat awen ikman uglal n addinat daɣ alxalim