The amount of water in the hydrosphere is constantly increasing due to?

The hydrosphere actually plays a very important role in human life, since the earth is 71% filled with water, while the land is only 29%, just the bulk of the water is in the ocean, then a little less in glaciers and goes down to surface land waters, it is not a little important point that the upper layer of the ocean contains up to 140 trillion tons of carbon dioxide and 8 trillion tons of oxygen that we breathe, the amount of water growth in the hydrosphere is due to the World Ocean and volcanic eruptions, and do not forget about the water cycle in nature.