Scientists Discover a Prime Renewable Energy Source: Water Vapor in the Atmosphere

"The researchers, however, showed that humid air may be a source of charging surfaces to voltages of around one volt. “If a AA battery is 1.5V, there may be a practical application in the future: to develop batteries that can be charged from water vapor in the air,” Prof. Price adds."

https://scitechdaily.com/scientists-discover-a-prime-renewable-energy-source-water-vapor-in-the-atmosphere/