Bongolala, since when did sewer system ikaonekana kwa picha? Isn't it buried underground? I know it's not a common thing in Dar where you use pit latrines but yes, sewer systems are buried underground just like water pipes.
About that picture above, hizo barabara za pipeline most of them got a facelift. They don't look the same anymore.
Talking of trees, show me even a single one here
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Pipeline ndio hii iko na miti hadi nyumba za tiled roofs with parking spaces
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