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World's 25 dirtiest cities
The list has been compiled by Forbes basis Mercer Human Resource Consulting's 2007 Health and Sanitation rankings that ranked 215 cities worldwide based on levels of air pollution, waste management, water potability, hospital services, medical supplies and the presence of infectious diseases.
Here's the top 10 World's Dirtiest Cities:
On a positive note: according to Water Aid for every $1 spent on improved sanitation, the benefit equals $9 resulting from decreased cost of health care and increased productivity -- yes, the 90/10 rule. It looks like a little bit of work and expenditure can make A LOT of difference.