Mumbai will be among one of the world's largest cities by 2015, while London will lost its place as one of the 30 most populated cities in the world, a US sociologist has
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/mumbai-will-beat-london-numbers-15-years
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/asian-age-new-delhi