Currently, only 50 percent of urban sewage is treated.

FORBES: Quenching China's Thirst For Water

Unfortunately, many key urban features like adequate power and sewage are only just starting to be built.

CNN: SHARE THIS

Lo had been driving sewage collection trucks for the Urban Council for some 20 years when he was assigned in 1998 to the night shift.

CNN: The Whistleblowers

The population of Venice and its accompanying urban sprawl on the mainland pour their sewage directly into the lagoon relying on twice-daily tides to flush this into the Adriatic.

ECONOMIST: Flood barriers

By 2015, the government intends to add 42 million tons of daily sewage treatment capacity to increase its urban waste water treatment rate to 85 percent.

FORBES: Quenching China's Thirst For Water