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Considering that pigeons are often described as "rats with wings," I'm not surprised that the Pigeon d'Or project was created. Turning their dirt droppings into detergent--yes, clean, soapy detergent--Tuur Van Balen hopes to make a unique environmental impact in urban cities such as New York and Chicago.

Funded by the Flemish Authorities, the Pigeon d'Or project centers around feeding these birds a special concoction that turns their poop into soap.