In view of the wide-spread negligence concerning water vapour as the most efficient greenhouse gas. its role in the recent climatic evolution is investigated. Increase of tropospheric water vapour content and rising evaporation (by about 15 %) from tropical oceans have been found in recent decades. Evidence for an accelerated hydrologic cycle is given. https://www.reesfrashers.shop/product-category/wetsuit-hoods/