قرآن پوهنه

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Quotes

Water and water pollution in Afghanistan
Water is a tasteless, odorless and amorphous substance that has a specific standard temperature and pressure.

Water H2O is a common term used for the liquid form of two compounds of oxygen and hydrogen.

Water is an essential element of the environment, which is very important for the life of living organisms, that is, the life of all living organisms depends on water.

So it was said that water is a basic element of the environment and it can be seen in nature in three forms, which are solid, gas and liquid.

70% of the earth’s surface is covered by water, of which 97% is salt water that we cannot use directly, and only 3% is fresh water that is available underground and on the surface of the earth. We use them directly for various purposes.

Water is a vital substance that all living beings need and has a very important role in keeping the environment clean, that is, where there is water, there are green areas, trees and a clean atmosphere, and environmental problems are less and human and animal diseases are not at all. be reckoned with

Aquatic bacteria:
The World Health Organization or WHO defines water pollution as: the presence of any substance such as gases, suspended particles, chemical and biological substances in water that is harmful or dangerous to the health of all living organisms is called water pollution.

Water is a pure, colorless, odorless, and tasteless substance.

Every year, 25 million people lose their lives in poor countries due to polluted water, 3/5 of them are children.

50% of the world’s children’s diseases originate from polluted water, and most of the poor or backward countries of the world are dealing with this problem.

Sources of water crickets:
1: Watering by a known source.

2: Water contamination by an unknown source.

Water contamination by a known source:

In this case, the pollutant enters the water directly and the diagnosis and control of this source can be done easily.

Water contamination from an unknown source:

In this case, the pollutant is spread in an unregulated manner in a free and wide environment.

This bacteria is very harmful to the living environment and it is difficult to prevent and diagnose this bacteria compared to the bacteria that does not spread from a specific source.

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