Amazing New Self-Cleaning Materials

Throughout human history, mankind has had to spend time, money, and energy cleaning things.  In addition to the resources absorbed, we've had to pay the price in terms of disease, spoilage, and operational problems when things were not cleaned properly.  Fortunately, recent breakthroughs in materials science are making a wide range of self-cleaning items available for the first time.  What are these items?  How do they work?  What are the implications?  We'll explain. 

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