In Ague, Niger, boys operate a foot pump to draw water. This is a interesting mode to balance the force.http://www.nytimes.com/2007/02/11/world/africa/11niger.html?_r=1&scp=3&sq=niger%20and%20kamber&st=cse
Reference: Article by Lydia Polgreen, and picture by Michael Kamber.
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