A new source of green energy has been developed – from dirt and microbes

The developers note that the lower part of the cathode is at a sufficient depth to access moisture deep in the soil, while the upper part, in turn, is flush with the surface. The device is cleverly designed to protect it from dirt, and parts of the cathode are made of water-resistant material to protect it from waterlogging. In tests, the device generated 68 times more energy than it needed to power its own systems.