| by Emily Alpert, The Los Angeles Times World Now Blog.  Article relevant to GSS Population Growth chapter 4. Excerpt: ...Africa and Asia are expected to make up 86% of the growth in urban populations worldwide in the decades leading up to 2050, according to the United Nations. Newly released estimates show the urban population in Africa is expected to roughly triple, exceeding 1.2 billion; urbanites in Asia will soar from 1.9 billion to 3.3 billion. There's an upside to urbanization: Educating people and bringing them other services is easier when they’re clustered in cities. The downside: Countries will have to scramble to provide enough urban jobs, housing, energy and infrastructure to avoid an explosion of slums, the U.N. says....  Full article at http://latimesblogs.latimes.com/world_now/2012/04/hold-urban-growth.html