Former British Science Minister Paul Drayson, a peer in the UK’s House of Lords, has developed a way of channelising “electrosmog” – the invisible clouds of electromagnetic radiation that enable mobile and Wi-Fi networks. Called Freevolt, the energy-harvesting system draws power from multiple wavebands of the electromagnetic spectrum with an antenna. The technology, which was recently launched, was placed inside a personal air pollution sensor called CleanSpace, to allow individuals to monitor the air quality around them. The sensor, called Tag, combined with a mobile app, keeps track of carbon monoxide levels and transport choices made by the user. This is reportedly the first commercial device to be powered solely from ambient radio frequency energy. Drayson plans to license the technology to other commercial partners to produce and market tools or wearables.