...the national urban population.23 Notwithstanding the bold apportionment of major centers (currently the number of cities with a population of more than 1 million is 23), indices measuring the concentration of population (and correspondingly production and others...

...Lagos, Karachi, Delhi, metro Manila, Jakarta, Istanbul, Hangzhou, Hyderabad, and Lahore. Worldwide, the number of cities with a population of more than 1 million increased from 326 in 1990 to 41 1 in 2000. The projected number in 2015 is 622. Benefits and problems...