The discharge of waste into waterways without consideration, has caused major disasters with water becoming so polluted as to become a problem. Biological, chemical, and physical material degrades the quality of the water and affects living organisms. Waste products have caused sewage problems because treatment facilities have not been done according to the needs. Pollutants cause water pollution problems. Excess dissolved solids make water not good for one to drink or to use it for crop irrigation.
Water is a powerful solvent, it stores heat and cold well.
It conducts heat away from warm bodies much quicker than air does. It dissolves more solids than any other solvent, like dirt. The physical properties and the chemical properties make it act as a positively charge pole due to its hydrogen atoms that are attached to the oxygen atom, which acts as a negatively charge pole. Lakes can become aged by the over fertilization. Here in Chicago, at Lake Michigan, the interaction of microorganisms play an important role in maintaining the quality of the water.