Concentrated solar energy scorches human feces with 700 degree heat.

Sol-Char Toilet, created by researchers at the University of Colorado, proves that human waste is anything but useless. Powered by the sun, it transforms excrement into biochar, a material that can be used as fertilizer or fuel. Biochar is not only an ideal fertilizer, but it can help to reduce pressure on the world’s finite natural resources.

The device uses a combination of parabolic mirrors inside fiberoptic cables to concentrate the sun’s energy on a single point, which in turn creates heat of up to 700 degree fahrenheit. This heat is used to scorch and sterilize human waste, which leaves behind a charcoal-like substance that is much easier to transport and put to use on farms around the world.

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