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The Creative Ways Innovators Are Recycling Air Pollution

To reduce air pollution, some innovators are making good use out of it.
One scientist has figured out a way to turn car exhaust into printer ink.
One scientist has figured out a way to turn car exhaust into printer ink.Jarhe Photography/Shutterstock.com

We know the basics of what can be recycled and reused: paper, plastic, metal, glass. But there is an increasing host of waste that can now get repurposed thanks to technological advances.

Scientists have figured out, for example, how to use human poop—and that of horses, rhinos, and elephants—to power buses, rickshaws, and even homes. There’s technology now to turn restaurant grease into biofuel, ocean waste into shoes, and sewage into natural gas. Bill Gates has even proven that sewage can power the very system that turns sewage into—gulp—drinking water.