Here, the object is to swim through thick, filthy water along two 60-yard lengths of a flooded peat bog trench, using only the paddling power of two feet and a snorkel to breathe.

BBC: The UK��s highly unusual athletic games

Unchecked sewage and filthy water have compounded the cholera problem, and Zimbabwe's death rate from the disease is 10 times greater than rates in areas where treatment is available, Carter said.

CNN: Carter: Cholera-, inflation-ridden Zimbabwe 'a basket case'

The goal is to hold them accountable by having them scrutinize their supply chain practices to ensure that no filthy water is seeping into waterways somewhere in the process from chemical to laptop.

FORBES: Targeting Companies That Pollute China's Waters

To the long list of great ideas gone bad, add the UV Waterworks--a simple, cheap device to purify filthy drinking water in poor countries.

FORBES: Running dry

He's now 53, but he recalls illegally swimming in the river and bicycling its banks as a 10-year-old boy with other youths -- until they discovered how filthy the water was, he said.

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Black vinyl floors polka-dotted with chewing gum are overlooked by walls part covered with grey-beige corrugated metal and finished with brickwork rendered filthy by the water from above.

BBC: What makes a terrible railway station?

Not only does it take a huge amount of water but the mixture that comes back up is filthy.

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