They all refer to a world engulfed by water, thus determining the future of Mankind. The Mediterranean Sea - courtesy NOAA Water is so familiar in our daily life that we often forget its importance and uniqueness. It owes the extremely important role it plays on the surface of the Earth to its very specific physico-chemical characteristics. Without water, there is little doubt that the Earth would be just another dead celestial object. Its surface would look much like that of the Moon, with craters and a lot of dust.
Water is a universal solvent in the biosphere.
It is an essential part of all biochemical reactions. It is a major constituent, not only of the environment that surrounds all living aquatic and terrestrial organisms, but also their inner parts. The youngest, most vigorous, and most active tissues are generally those with the highest water content. Plants for the most part take the water and mineral salts they need from the soil. It is intimately involved in the functional systems, and it takes part in the decomposition of a number of substances such as sugars.