Here is your essay on Methods used to Control Air Pollution !

1. Mechanical devices generally work on the basis of the following: (i) Gravity: In this process, the particles settle down by gravitational force. (ii) Sudden change in direction of the gas flow. This causes the particles to separate out due to greater momentum. 2. Fabric Filters: The gases containing dust are passed through a porous medium. These porous media may be woven or filled fabrics. The particles present in the gas are trapped and collected in the filters. The gases freed from the particles are discharged. 3. Wet Scrubbers: Wet scrubbers are used in chemical, mining and metallurgical industries to trap SO2, NH3, metal fumes, etc. 4. Electrostatic Precipitators: When a gas or an air stream containing aerosols in the form of dust, fumes or mist, is passed between two electrodes, then, the aerosol particles get precipitated on the electrode. c. Other practices in controlling air pollution -Apart from the above, following practices also help in controlling air pollution.

Short essay on Control of Air Pollution in India

06/01/2014 · Essay on Air Pollution: Causes, Effects and Control of Air Pollution


Mountains and valleys have characteristic airflow patterns, too. In the evening, as the earth cools, the coldest air will sink into the lowest part of the valley. This creates a stable inversion layer because lighter, warmer air stays above the valley. In this way, pollutants are trapped in the valleys all night. During the daytime when heating occurs, the air in the valley is warmed and rises, permitting the pollutants to escape. Unfortunately, this heating and upward motion does not always occur. During periods when high pressure settles over a region and the air is stagnant, the atmosphere is stable all day long, and pollutants continue to accumulate in the valley. Some of the worst episodes of air pollution have occurred in mountain chains like the Appalachians, where industries are located in the valleys between adjacent hills.


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Air (Prevention and Control of Pollution ..
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The effects we could do to save our planet from pollution could be proactive, instead of catastrophic and disastrous. Everyone benefits when we have clean water, air, land, etc. not just one thing. For example, you never hear any news on the TV, or over the internet talking about how a person passed away from clean air overdose, that would be crazy. Instead we hear news like, man died from pollution, family living in home pollution, water tests show pollution particles, the list could go on forever. By identifying the problem early, we can start to reverse the pollution process. Therefore, we can take what we have now and set new standards and laws that can help us from killing ourselves in the long run and putting the earth in a more clean state. The problem is, not everyone agrees with the fact that pollution is hurting us right now, or going to hurt us, and new generations to come. People get this information from insignificant and false sources and then spread that information to others that will willingly listen, without objection. This statement misses the point though; the fact is people are trying to help us now. And even though we might not feel the negative effects, it doesn’t mean it’s not happening to us right now. Some places have higher levels of pollution in their air and water and those people might be in more danger than...

Air pollution is a general term that covers a broad range of contaminants in the atmosphere. Pollution can occur from natural causes or from human activities.

Essay on Air Pollution – Sources, Types and Control

Wet scrubbers similar to those for controlling suspended particulates may be used for gas absorption. Gas absorption can also be carried out in packed scrubbers, or towers, in which the liquid is present on a wetted surface rather than as droplets suspended in the air. A common type of packed scrubber is the countercurrent tower. After entering the bottom of the tower, the polluted airstream flows upward through a wetted column of light, chemically inactive packing material. The liquid absorbent flows downward and is uniformly spread throughout the column packing, thereby increasing the total area of contact between gas and liquid. are most widely used as packing for countercurrent scrubber towers. These devices usually have gas-removal efficiencies of 90–95 percent.

OBJECTIVES OF THE BOARD : To prevent, control and abate air and water pollution : To maintain and restore the wholesomeness of water

Essay on Air Pollution for Children and Students

Air pollution is a general term that covers a broad range of contaminants in the atmosphere. Pollution can occur from natural causes or from human activities. Discussions about the effects of air pollution have focused mainly on human health but attention is being directed to environmental quality and amenity as well. Air pollutants are found as gases or particles, and on a restricted scale they can be trapped inside buildings as indoor air pollutants. Urban air pollution has long been an important concern for civic administrators, but increasingly, air pollution has become an international problem.