Air Pollution

Topics: Air pollution, Smog, Oxygen Pages: 3 (854 words) Published: October 2, 2013
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Air Pollution
What is Air Pollution?
Air Pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or damages the natural environment into the atmosphere. What is Atmosphere?

The atmosphere is the complex dynamic natural gaseous system that is essential to support life on planet Earth. Stratospheric ozone depletion due to air pollution has long been recognized as a threat to human health as well as to the Earth’s ecosystems. What are Air Pollutants?

An air pollutant is known as substance in the air that can cause harm to humans and the environment. Pollutants can be in form of solid particles, liquid droplets, or gases. In addition, they may be natural or man-made.

Classification of Air pollution

Primary air pollutants:
Pollutants can be classified as either primary or secondary. Usually, primary pollutants are substances directly emitted from a process, such as ash from a volcanic eruption, the carbon monoxide gas from a motor vehicle exhaust or sulfur dioxide released from factories.

Primary Air pollutants
Sulfur Oxides (SOx)
-Especially sulfur dioxide, a chemical compound with the formula SO2. SO2 is produced by volcanoes and in various industrial processes. Since coal and petroleum often contain sulfur compounds, their combustion generates sulfur dioxide. Further oxidation of SO2, usually in the presence of a catalyst such as NO2, forms H2SO4, and thus acid rain. Nitrogen Oxides (NOx)

-Especially nitrogen dioxide are emitted from high temperature combustion. Can be seen as the brown haze dome above or plume downwind of cities. Nitrogen dioxide is the chemical compound with the formula NO2. It is one of the several nitrogen oxides. This reddish-brown toxic gas has a characteristic sharp, biting odor. NO2 is one of the most prominent air pollutants. Carbon Monoxide

-Is a colourless, odourless, non-irritating but...
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