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Air pollution: Air impurities [i.e. nitrogen dioxide, sulphur dioxide and respiratory particles.

Updated on April 5, 2011

Task 1 - Air pollution: Air impurities [i.e. nitrogen dioxide, sulphur dioxide and respiratory particles (PM10)] affect the health and the environment. Find out the sources of these impurities and their possible effects on environment and health.

Air pollution causes serious harm to humans and other living organisms as well as cause damage to the natural enviroment. Air is the most important element for human being to live in. The population of the world is increasing day by day, without having proper knowledge and ignorance of people air is polluting in many ways. The pollution of air is increasing continuously therefore, right initiative for concerning and educating the people is very much needed to make the world air polluting free.

Sources of air pollution:

There are many sources for air pollution such as such as factories, power plants, dry cleaners, transportation vehicles, volcanoes, industrial process, dust storm, wildfires, cattle and other animals which emit methane.

The pollutants of air are sulphur oxide, nitrogen oxide, carbon monoxide, carbon dioxide and so on. Sulphur oxide which is produce by volcanoes and industrial process. Coal and petroleum contain sulphur compounds and their combustion generates sulphur dioxide. Nitrogen oxide is emitted by high temperature combustion. Carbon monoxide is very dangerous gas which is produced by incomplete combustion of fuel. It also produced by the vehicular exhaust. Carbon dioxide produced by greenhouse, cement production, respiration and so on.

Effects of air pollution:

Carbon Dioxide (CO2):

Carbon dioxide makes the earth block some of the sun’s radiation from exiting the atmosphere. This is very much essential for survival without this gas the whole world would be covered by ice therefore it has great importance for living being as well as for the environment and the world. The quantity of the carbon dioxide should be in limit otherwise catastrophic hazard can happen. The level of carbon dioxide has been risen to 31 percent for pre-industrial revolution. The gas emitted since 200 years ago still be in our atmosphere that might be cause melting polar ice caps.

Nitrogen Oxides (NOx)

Nitrogen oxides can cause lung irritation and reduce the body's ability to fight from diseases such as influenza and pneumonia. This gas decomposed by sunlight into nitrogen monoxide and atomic oxygen, which in-turn combines immediately with oxygen and form ozone.

Carbon Monoxide (CO)

Carbon monoxide blocks the blood's ability to carry oxygen therefore the natural process of the body is troublesome consequently we may suffer dizziness, mental confusion, severe headaches, nausea, and fainting on mild exertion.

Sulphur Dioxide (SO2)

Young children and asthmatics are mostly vulnerable for this kind of air pollutant. It is the major component of acid rain.


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