The water of the ocean is evaporated in a large amount into the atmosphere and then condensed into the clouds, fog, mist etc. After the dew point arises, precipitation takes place and fill up the freshwater bodies of the land surface. Again the water flow goes into the ocean and in this way a complete hydrological cycle works on the earth. This is beneficial for the life on the earth, as fresh water is provided for agriculture and other occupations.
