Solar-powered kiosks turning mango waste into bioelectricity — analyzing your nails for vitamin deficiencies in seconds.
You clip your fingernail and watch a tiny arc of electricity — generated from today's mango waste — flash across the clipper blade. Within 5 seconds, a warm orange LED glows and the screen says "Low in Vitamin D" while a free mango-flavored Vitamin D gummy drops into the tray — all powered by the fruit waste in the bio-digester beneath your feet.