Pilgrim, Nick; Roche, Bob; Kalbermatteni, John - 2012
In Africa, Asia, and Latin America, the number of towns and their populations are expected to double within 15 years, and again within 30. Already, one-third of Africans and Asians live in towns of 2,000 to 200,000 people. This rapid urbanization makes improving water supply and sanitation...