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Last updated: 5 December 2014      
Solar kangaroo1
Solar kangaroo2

The Solar Kangaroo is a solar water pasteurization device. It is designed to kill waterborne bacteria by heating water to 65 °C (149 °F) for one hour to make water safe to drink. The Solar Kangaroo works by using the sun to heat a water container inside a clear plastic pouch that includes a parabolic trough for focusing and reflecting sunlight onto the water container. The black color of the water container acts like a light magnet absorbing all available light striking its surface. The container's molecules are excited by the photons that make up the light resulting in heat that is transferred to the water. Finally, the clear plastic pouch helps to retain heat by promoting a greenhouse effect and preventing heat loss due to wind and air temperature.

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Web: http://www.h2ohow.com/solarkangaroo/