Air Pollution

Air pollution

Pollution- Starting from the basics

“The change in the environment caused by natural or artificial input of harmful contaminants into the environment, and may cause instability, disruption or harmful effects to the ecosystem.”

Thus, Pollution is essentially the introduction of toxins into the natural setting that causes negative changes. Pollution can take the form of biochemical substances or energy, such as noise, heat or light. Contaminants, the constituents of pollution, can be one or the other, a foreign substances/energies or naturally found pollutants.

Air Pollution

Air pollution is the introduction of pollutants, organic molecules, or other unsafe materials into Earth’s atmosphere, causing diseases and death to humans, harm to other living entities such as animals and crops, or the natural or built environment. Air pollution may come from man-made or natural causes.

The atmosphere is an intricate natural gasiform system that is vital to support life on planet Earth. The depletion of the Ozone layer due to air pollution has been accepted as a risk to human well-being as well as to the planet’s ecosystems.

An air contaminant is a substance in the air that can have negative effects on humans and the ecosystem. The constituents can be dense particles, fluid, or gasses. A contaminant can be of natural or artificial. Contaminants are categorized as primary or secondary. Contaminants that are typically created by a process, e.g.,CO gas from auto mobiles exhaust or the SO2 released from factories are known as a Primary Pollutants. Contaminants not emitted directly are called Secondary pollutants.They are formed in the atmosphere when prime pollutants react or intermingle. Ground level ozone is an important example of a secondary pollutant. Some contaminants may be both primary and secondary: they are both emitted directly and formed from other primary pollutants.

Sources of Air Pollution

1.Man-made (Artificial) sources:

These are mostly linked to the combustion of several kinds of fuel.

Immobile sources entail clouds of smoke from power plants, industrial facilities (manufacturing works) and waste furnaces, as well as incinerators and other sorts of fuel-burning heating devices. In poor and developing countries, archaic biomass burning is the chief cause of air pollution; traditional biomass embraces wood, crop leftovers and excrement.

Movable sources comprise of auto mobiles, aquatic vessels, and planes.

Controlled burning is a procedure sometimes used in forest management, agriculture, prairie re establishment. Fire is a accepted facet of both forest and grassland ecosystem and an organized fire can be an instrument for foresters. Precise burning kindles the sprouting of some desirable trees, thus renewing the forest.

Fumes from hair spray, paint, aerosol sprays, varnish and other solvents

Waste deposits in land fills creates methane. Methane is extremely combustible and may form an explosive and volatile concoctions with air. Methane is furthermore an asphyxiant and may displace oxygen in a sealed off space. Suffocation may result if the oxygen concentration goes below 19.5% by displacement.

Military resources, such as nuclear weapons, toxic gasses, germ warfare and rocketry

2.Natural sources:

Dirt from natural sources, typically big areas of land with little or no plant life.

Methane, discharged by the breakdown of food (digestion) by animals, for example, cattle

Smoke and CO from jungle fires.

Volcanic activity, which emits sulfur, chlorine, and ash particulates

Major Effects of Air Pollution

1.Respirational and cardio complications: The adverse impacts of Air pollution are distressing. They are the root of numerous respirational and cardiac conditions accompanied by Cancer, midst other threats to our body. More than a few million are known to have expired due to direct or unforeseen effects of Air contamination. Kids in areas open to air contaminants are said to suffer frequently from pneumonia and asthma.

2.Global warming: One more direct consequence is the speedy changes that the world is observing due to Global warming. With the increase in temperatures worldwide, an increase in sea levels and melting of ice from cold areas and icebergs, displacement and loss of habitat have already beckoned an imminent disaster if actions for protection and regulation aren’t undertaken soon.

3.Acid Rain: Dangerous gasses like NO2 and SO2 are released into the atmosphere during the incineration of fuels. When it rains, the droplets combine with these pollutants, become acidic and then fall on the ground in the form of acid rain. Acid rain is a source of great harm to human beings, wildlife and crops.

4.Eutrophication: Eutrophication is a process where a high amount of nitrogen present in some contaminants gets morphs on sea’s surface and develops itself into algae and harmfully affect fish, plant life and animal species. The green colored algae that are present in lakes and ponds is due to the presence of this substance only.

5.Diminution of Ozone layer: Ozone is present in earth’s atmosphere (Stratosphere) and is responsible for shielding humans from injurious ultraviolet (UV) rays. Earth’s ozone layer is diminishing because of the presence of chlorofluorocarbons and hydro chlorofluorocarbons in the atmosphere.


Practise This Question

Ozone layer protects us from harmful _______ rays of the sun.