Sewage also causes many diseases such as cholera and typhoid that will detrimental to humans. Rivers contaminated by sewerage contain high levels of organic pollutants, and they become breeding grounds for harmful bacteria and viruses that may cause fish and other aquatic organisms impossible to survive and become extinct. Sewage that causes water pollution is one of the most important problem in the earth today. Water pollution caused by when humans started discarding sewage and toxic chemical into the ocean, effluents from industries, manufacturing and agro-based industries, dumping, oil pollution, acid rain and so on. Fish and other living organisms need water which forms lakes, rivers and oceans as their shelter. The human body consists of more than 50% of water, so it proves that humans can survive without food but cannot survive if without water. Water is one of our most valuable and important resources because all living organisms require water to survive their life. W.H.Auden said that “thousands have lived without love, not one without water”. Water is basic to life requirements and more than 70% of the earth’s surface is cover by water.
0 kommentar(er)
