Watter vapour or aqueous vapour is the gas phase o watter. It is ane state o watter within the hydrosphere. Watter vapour can be produced frae the evaporation or bylin o liquid watter or frae the sublimation o ice. Unlik ither furms o watter, watter vapor is inveesible.[1] Unner typical atmospheric conditions, watter vapor is continuously generatit bi evaporation an removed bi condensation. It is lichter nor air an triggers convection currents that can lead tae cloods.

Watter vapor is a potent greenhoose gas alang wi ither gases such as carbon dioxide an methane.


  1. "What is Water Vapor?". Retrieved 2012-08-28.