Observation of air pollution
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In the region of the town of Silistra there are no big industrial enterprises, sources of harmful emissions in the surroundings. After the starting in exploitation of the Metallurgical Works in Călăraşi [correction of Kalarash] in 1987 began the complaints of the population as result of episodic pollutions of the atmospheric air in the region. Productions of similar character emit in the atmosphere dust, sulfur dioxide, carbonic oxide, nitric oxides, hydrogen sulfide, fluorides, ammonia, pyridine, aromatic and polyaromatic carbohydrates, phenol and aerosols of heavy metals. For this purpose on the territory of the town of Silistra two stationary stations of HEI are functioning for systemic observation and evaluation of the atmospheric pollution for the indices: dust, sulfur dioxide, nitric dioxide, hydrogen sulfide, phenol and aerosols of heavy metals. All data are statistically processed by means of statistical programme packet "STATGRAPH".
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Air pollution is the process of introducing either directly or indirectly in the air which makes it unhealthy for the organism living and the generally environment conclusiveness.
There are several causes of air pollution
They includes:
Burning of the fossil
These includes natural gas, oil and coal.
The gases are introduced in the air that causes the pollution and hence can lead to the natural acquisition.
Introduction of the agricultural gases and chemicals that are used in agriculture and makes it possible for the introduction of the pollution .
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