Has anyone ever stopped to consider what a horrendous image the green lung of a city actually conjures?
(And incidentally, the government that wants people to stop smoking also wants everyone to know how lovely it is to live in a green lung.)
Anyway, enough of this green lung rubbishing. Allow me to present the urinary tract.
![](http://img.photobucket.com/albums/v11/rekraft/gutter.jpg)
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