Question

causes of water pollution

Answer 1

Polluted water from industries..
Bathing of animals in the rivers...
Polluted water from dumping areas..
Washing clothes near rivers...
Oil leakage in seas....

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Answer 2

Hi mate

Causes of Water Pollution

• Sewage from domestic households, factories and commercial buildings Sewage that is treated in water treatment plants is often disposed into the sea.  Sewage can be more problematic when people flush chemicals and pharmaceutical substances down the toilet.

• Dumping solid wastes and littering by humans in rivers, lakes and oceans.  Littering items include cardboard, Styrofoam, aluminum, plastic and glass.

• Industrial waste from factories, which use freshwater to carry waste from the plant into rivers, contaminates waters with pollutants such as asbestos, lead, mercury and petrochemicals.

• Oil Pollution caused by oil spills from tankers and oil from ship travel.  Oil does not dissolve in water and forms a thick sludge.

• Burning fossil fuels into the air causes the formation of acidic particles in the atmosphere.  When these particles mix with water vapor, the result is acid rain.

• An increase in water temperature is caused by global warming and thermal plants that use lakes and rivers to cool down mechanical equipment.

Water Pollution Facts

Following are some facts on water pollution:

• Fourteen billion pounds of garbage, which is mostly plastic, is dumped into the ocean every year.

• The Ganges River in India is one the most polluted rivers in the world with sewage, trash, food, and animal remains.

• According to United States Environmental Protection Agency (U.S. EPA) estimates, 1.2 trillion gallons of untreated sewage, stormwater, and industrial waste is dumped into U.S. waters annually.

• About 700 million people globally drink contaminated water.

• Aquatic animals face an extinction rate of five times more than that of terrestrial animals.

• Over 30 billion tons of urban sewage is discharged into lakes, rivers and oceans every year.

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