At lest hundreds of thousands of residents of Mexico City, the capital of Mexico, are failing to receive a permanent water supply. It is a puzzling problem in a city the Aztecs built on five lakes and which consequently suffers annual flooding. Some analysts are saying that it is an example of the stark divide between rich and poor in the country. Authorities are promising changes to deal with the long-term problem, but soultions have not yet been seen. Al Jazeera's Rhodri Davies reports (20 April, 2010).
