Watch video on YouTube Researchers at the University of Waterloo have developed an inexpensive device that generates enough electricity to power a calculator using only waste walnut shells and drops of water. The coin-sized device – known as a water-induced electric generator (WEG) – produces electrical energy as water evaporates from a complex network of pores that make up the shell structure. “It all happens with nothing more than a single droplet of water and the shell’s natural arch…
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