Water is a binary inorganic chemical combination – Н2O. One molecule  consists three atoms – two atoms of hydrogen and one atom of oxygen. Covalent forces unit all of three atoms Water – is unclouded liquid which has no any color or smack or taste.

361,1 million kilometers of water cover 71% of surface our Earth. The hard core of water is oceans. Groud waters and ice cellars share the second pace of water-supply. Most of this water can’t be used for water drinking or development of agriculture because of a lot of salt.  Groud waters and ice cellar contain 98% all of fresh water on our planet.

Water is the most important thing for our life. It is а source of becoming life and its sustentation. It influences as climate as whether. So the water is the thing of momentous importance for all flesh on Earth.