Today 60 percent of Moroccans reside in urban areas, as opposed to 35 percent in 1970. By 2050, nearly three-quarters of the country’s population will be living in cities.

Central America is undergoing an important transition. Urban populations are increasing at accelerated speeds, bringing pressing challenges for development, as well as opportunities to boost sustained, inclusive and resilient growth.

This paper presents the results of an investigation of selected census towns in northern India. Census towns are settlements that India's census classifies as urban although they continue to be governed as rural settlements.

An inadequate piped water supply from the public utility, characterized by intermittence and unreliability, and supplemented by private uncontrolled groundwater abstraction, is a common feature of most Indian cities as well as other developing cities in the world Given the high level of pollution of urban aquifers, the usual diagnosis consists in considering private groundwater abstraction as an u