Plants, as with any other living thing, is guaranteed to generate waste, but thankfully, plants deposit their into the soil as well as surrounding water where their roots have painstakingly searched out for throughout its growth. Bacteria which feed on such waste will leave spare electrons, hydrogen ions, and carbon dioxide behind, which is why Bert Hamelers and his team from Wageningen University in the Netherlands intends to make use such ions by sending them to a cathode, while the electrons remained behind, creating an electric potential difference – or in common parlance, voltage. Basically, a test system showed that it could generate 0.44W per square meter after being fitted with such plant-based fuel cells. Perhaps there are ways to increase the production of electricity by a massive amount sometime down the road?