Recently, four people lost their lives and 56 others were taken to hospital after drinking polluted water in a small town in Nigeria.
Water pollution gets more serious as the days go by largely because of economic activities of humanity accompanying environmental destruction.
Lots of waste water released from production facilities flows into rivers, lakes and seas to seriously pollute water.
A few years ago, a research group of a country published their study result that lakes on earth and their deposits are heavily contaminated by at least seven substances.
The contamination of sea is also as much severe as that of lake.
During a survey of the oceans of the world last year, scientists of a country discovered that the bottom of the oceans has been polluted by plastic waste two times more than their surface.
The analysis result said that the ocean depths are covered with about 14 million tons of plastic particles.
Human existence is unthinkable without water.
However, the world’s population growth, natural disasters like flood and drought, forest destruction, massive release of industrial waste water and others have diminished fresh water resources day by day.
According to a survey result, about a billion people in the world have difficulty getting drinking water and over 30 percent of the world population are suffering from water shortage at least for a month in a year.
Various abnormal symptoms have developed among the people who drink contaminated water.
A few years ago the residents of a city in a country used lead-containing river water as drinking water for one and a half years. In the period the number of children increased who developed rash on the skin and hair loss. Test results showed that their blood contained two or three times more lead than before.
The WHO warned that lead poisoning causes nephritis, hypertension and anaemia.
Lead poisoning is particularly fatal to the unborn foetuses, children and pregnant women and in serious cases it will lead to death, causing spasm.
The reality shows that the prevention of water pollution and conservation of fresh water resources are an urgent task that should not be ignored any longer.
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