Karachi is now among the top ten ranking of largest cities globally. During 2005, the population of Karachi was at 15.1 million which is predicted to reach 27.5 million by 2020. The number of households in 2005 was about 2.1 million and by 2020 it will rise to 3.9 million, which means a rise of 1.77 million households, at an average size of 7 persons per household. Even at …
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