PlayPumps Water System

HOW – “… kinetic energy generated from 25 children on the roundabout is used pump 1400 litres (370 gallons) of water per hour at an average 16 rpm, effective up to a depth of 100m.”

WHY – “.. water collection is overwhelmingly undertaken by women and children, the time saved through the installation of a locally operational water supply will allow girls to attend school and women to concentrate on more productive activities.”

More information: Wikipedia – PBS Frontline