Air+Pollution

==  == == //**Air Pollution**//    ==

media type="youtube" key="UcWpkWBX04E&hl=en&fs=1" height="344" width="425" ==== * I am sure that everyone has experienced the effects of air pollution, it is deeply unpleasant and its effects are grave.  ====


 * Air pollution is caused by the** excess of pollutants in the air**. It does not only cause** health problems **in human and can also** damage the environment and property. **Air pollution also causes the thinning of the protective ozone layer of the atmosphere, which leads to climate change. Air pollution and the** increased greenhouse effect **is closely linked.

The main primary air pollutants include carbon monoxide (CO), oxides of nitrogen (NOx eg NO, NO2, N2O), sulfur dioxide (SOx eg SO2, SO3), hydrocarbons (VOCs) and particulates.

The main sources of air pollution originate from** combustion of fuels, electircan storms, volcanoes, formation of dust, incomplete combustion of fuels of coal, petrol and unburned gasoline solvents**. The effects of these pollutants cause various problems for the health and environment.



__Pollutants and their Effects__

Carbon monoxide is the incomplete oxidation of methane and incomplete combustion of fossil fuels. The effects of health includes the prevention of haemoglobin from carrying oxygen. It can be prevented by using a lean burn engine or a catalytic converter. CO is a colorless, and odorless gas, vehicle exhaust is the largest from of CO production. Oxides of nitrogen is formed by electrical storms, biological processes, and can be found at high temperatures inside internal combustion engines. This pollutant can lead to respiratory irritant leading to respiratory tract infections. It can be prevented by using a lean burn engine, recirculation of exhaust gases or catalytic converter. Nitrogen oxides can commonly seen as a form of brown haze, causing smog in cities.

Sulfur dioxide originates from volcano eruptions, as wells as combustion of sulfur containing compounds, usually from coal and oil. However, these can be reduced with the use of alkaline scrubbing or fluidized bed combustion.

Particulates such as soot, ash, dust, sand and smoke are also classed as pollutants. These are very small particles suspended in the air, in size as small as particles, hence the name for it. Sedimentation chambers and electrostatic precipitation are the methods of reduction for particulates.

VOC. Volatile organic compounds are found in unburned or partially burned gasoline. It can only be prevented using a catalytic converter.

okay its enough reading there!  The following power-point shows the 2 most important removal methods of these pollutants.

Removal methods media type="custom" key="1908055"