Water – is the most constant and indispensable component of our daily lives. No domestic activity could be carried out without water. Water can be used in many ways: for domestic purposes, for industrial purposes, in agriculture, in power plants and many more. For domestic purposes, water is consumed for drinking, cooking, washing. , bathing, disposal of wastewater in the sewers and irrigation of gardens and streets. About 8% of water is used for domestic purposes by humanity. More than 85% of water used for industrial purposes is consumed for cooling. The rest is consumed in washing, settling and hydraulic solvent. Around half a million liters of water are used to produce each car; this includes the amount of water spent irreversibly and the reuse of water. In industrial applications, it consumes approximately 22% of all water used worldwide. Agriculture accounts for 70% of water consumption worldwide. This water is used for irrigation. For one tonne of cotton cultivation, 11 billion liters of water are required. Growing one ripe pumpkin requires 150 liters of water. Water is used for hydroelectric and thermal power plants, steam generation, rotating turbines and for cooling purposes. Even though electricity consumes enormous amounts of water, it is used almost without losses, in a closed loop. It is estimated that by the middle of the 21st century, global water consumption will exceed its natural flow. To solve this problem, different ways of obtaining fresh water are developed. Sources of water pollution can be physical, biological, chemical, thermal and radiological contaminants.• Physical pollution - the increase of insoluble impurities in water (sand, clay, silt) through rain runoff. .... middle of paper ...... "How Ozone Works." How ozone works. Pure ozonated water. Internet. May 5, 2014. "Ozone water treatment, ozonation, dirty water with bad taste from ozonator, contaminated colored water, unfiltered water, smelly water."Ozone water treatment, ozonation , dirty water with bad taste from the ozonator, contaminated colored water, unfiltered water, bad Smell water. Internet. May 10, 2014. “Ozone water purification.” Ozone water purification. Internet. May 14, 2014. “Ozone Water Treatment.” Ozone water treatment. Internet. May 16, 2014. .Martin, Robert. “Who uses fresh water.” Water facts and trends. Internet. May 17 2014. .