What water is

Water is a substance, whosebasic unit is a molecule. It is formed of an oxygen atom linked to 2 hydrogen atoms, and is written H2O (H for a hydrogen atom and O for an oxygen atom).

Omnipresent and essential for life, water is one of the most vital chemical bodies on our planet. In the air, on land or in the sea, water covers approximately 75% of the surface of our planet. Because 97% of it is salted and more than 2% is frozen, human beings have access to only a negligible part of the water: that in the lakes, rivers, streams and water tables.

All the living organisms on this planet contain water approximately 60% of the human body is composed of water, in a fish water represents 80%, in plants it represents between 80 and 90%.

The quantity of water on our planet is always the same one, and follows a global cycle. It is essential for the production of food, all of the living ecosystems, and for human development, hence our interest in protecting and preserving the water cycle. 

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