When one talks about renewable energy, most of us would naturally think of the sun as well as wind. What about noise? Well, scientists from Korea could very well stumble upon a gold mine, using chatty teenagers as the world’s next renewable energy source. We’re talking about (pun not intended) relying on the main ingredient of calamine lotion to transform it into a tiny material which can convert sound waves into electricity. Basically, this might eventually result in panels that could juice up a cellphone from a conversation – or perhaps deliver exra energy to an electrical grid generated simply from the noise of rush hour traffic. Better yet, we think installing this at airports would go some way in lowering the utility bills of running an airport, eh? Those might be more practical, since standing beside a loud-blaring speaker to charger your handset isn’t exactly the most enjoyable experience.