|Pic source: http://www.aef.com/exhibits/awards/clio_awards/2005/11|
America's 80 million dogs produce 11 million (US) tons of faeces every year, according to this article from NorthJersey.com, which is about DNA-testing the waste and prosecuting non-pooper-scooping owners.
What to do with it?
In these energy conservation conscious times, conceptual artist Matthew Mazzotta suggests using it as a power source for street lighting - see his Park Spark project here.
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