Researchers at the University of California, Irvine, have found that a strong electric field between airborne water droplets and surrounding air can create a molecule called hydroxide (OH) by a previously unknown mechanism.

This molecule is crucial in helping to clear the air of pollutants, including greenhouse gases and other chemicals.

The discovery is outlined in a new paper published in Proceedings of the National Academy of Sciences, which suggests that the traditional thinking around the formation of OH in the atmosphere is incomplete. Until now, it was thought that sunlight was the primary driver of OH formation, but this new research shows that OH can be created spontaneously by the special conditions on the surface of water droplets.