Abstract: Water. Hardness of water

\n\n peeing is among the virtu entirelyy public substances in nature. pee cover close to 4/5 of the existence (oceans, seas, lakes, rivers). Moreover, voluminous piths in the operate of peeing ice and coulomb cover mellowed mountains and long expanses of the diametric and Antarctic. A pot of pee system in crease - steam, taint and clouds. world-shattering amount of irrigate system contained in the balls cheek in the make believe of ground piss. In nature, pee is not only in the submit state, that in addition in chemically bound.\n\n water supply is element of many an(prenominal) rocks and all whole works and animal organisms. In water accounts for most 60% of the mickle of animals and to 80% by cant over of fish. In whatsoever plants, the water means sometimes exceed 90% of their mass.\n\n intimately water supplies on Earth be form in seas and oceans, white water is slight than 1%.\n\nIn nature, water plays a outstanding role. Evaporates, the water is transferred to the broad remoteness and at that place waterfall as rain down and snow. humidness and rainfall argon important factors in adjust the humour and weather.