Pollution

 

Pollution

Pollution :


Pollution is the introduction of contaminants into the natural environment, which harms them and cause a disturbance in the ecosystem, and these pollutants are either material extraneous to the environment or natural materials, but exceeded the levels accepted, and combined with pollution only chemicals but also extends to pollution different forms of energy such as pollution, noise and pollution warming.
Blacksmith Institute issued a list of the most polluted places in the world, and it captured the places in Azerbaijan, Ukraine, Peru, Russia, Zambia, China and India for the first ten mattresses (2007).

Pollution in history
Prehistoric

Since Paleolithic was the human race some impacts on the environment, Trying to human campfire was left badly it effects, as in the Iron Age tools industry led by sharpening metal into small chips and try to take out the slag them to form into images that can be used in everyday life to accumulations slightly from polluting substances.
Ancient cultures

Increased first advanced civilizations of Mesopotamia, in Egypt, India, China, Persia, Greece and Rome, the use of water for the manufacture of goods, increasing environmental pollution levels, however pollution in it did not disrupt time environment systems.
In the Middle Ages

Population growth has increased near the end of the Middle Ages and focus more within cities, creating hotbeds of pollution contributed to the spread of infectious diseases Ktaon bubonic.
In the modern era

Pollution has become a popular issue after World War II, and the use of nuclear weapons, which led to the emergence of a lot of laws and treaties that call for pollution control.
The nature of the pollution

Divides the pollution given the nature or given to the type of contaminant to:
Chemical pollution

Intended pollution chemical pollution chemicals manufactured both those which consist of the use of special purpose as materials cleaning and oils cars or those that produce side of the process industry as waste, this material can be received in the water Elmejraa or be spread in the air, causing environmental pollution, and this type of pollution is the effects of a very serious on various elements of the environment, has been the effects of this kind of clearly pollution emerged in the second half of the twentieth century as a result of the huge industrial progress witnessed especially in the field of chemical industries, and up the effects of chemical contamination of food, through the use of preservatives, colors and tints Flavour and taste and odor in the food industry, has been proven beyond a shadow of a doubt, the role of these substances in the creation of malignant tumors.

The lead and hydrogen sulfide and mercury compounds, cadmium and arsenic compounds cyanide, pesticides and chemical fertilizers and oil from the most polluting substances harmful to human health, and chemical pollution caused by industrial accidents in factories, as a result of the failure to take necessary measures to prevent the occurrence of such kind of incidents precautions, has drawn accidents industrial world's attention to the incident of pollution because of them, and paid a lot of bodies and governments to pay attention to the need to develop an international program includes the development of a safe and court systems, relating to manufacture chemicals, and methods of transport and storage, and the imposition of a permanent them control in order to preserve the lives of workers in these plants, and to preserve the surrounding environment these industries.
Biological contamination

The bio-contamination or biological one of the oldest images of pollution known to man, and created this pollution as a result of the presence of vivid visual objects or invisible plant or Hewanahkalpktrella, fungi, and other environmental center such as water or air or soil, Fajtlat pathogenic organisms food that eats human or water that drink or the air we breathed leads to biological contamination to occur, leading to disease.

Occurs biological contamination at the disposal of sewage and drainage - before treatment Kimaaúaa- dumping into freshwater resources, or because of household garbage spread in the streets without taking into account the health of the rules in the collected, transported and disposed of in a scientific way, or because of leaving dead animals in the open air or dumped into the water resources, as well as when you do not follow healthy ways to preserve food and manufactured exposing them to contamination.