U.N. report says China, India together will account for about third of the increase in urban population in coming decades

India will witness the largest increase in urban population in the next four decades followed by China, a United Nations report has said. India will add another 497 million to its urban population between 2010 and 2050, while China will see 341 million people shifting into cities, followed by Nigeria (200 million), the United States (103 million) and Indonesia (92 million), according to the U.N.'s ‘2011 Revision of the World Urbanisation Prospects' report released on Friday.