industrial visit for students which can practically train the students. Thanking You Yours faithfully (Signature) Mizanur Rahman Chowdhuary Student Id: 101825 Chemistry Discipline Khulna University Acknowledgement “When I hear‚ I forget.‚ When I see ‚ I remember.‚ but when I observe‚ I understand.” Its very essential for an Chemistry student to maintain a close relation between his/her educational curriculum with the chemical world. That can be done only by means of mere practical
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Reducing noise pollution. Noise pollution occurs when noise reaches levels harmful to health and the public peace. The noise is an undesirable‚ or to man unpleasant sound. The intensity of sound is expressed in units of sound pressure‚ or decibels. A very low whisper is about 10 dB‚ while a conversation in a normal tone is about 60 db and the sound of a rock concert reaches about 100 db. The main sources of noise are: means of transport such as cars‚ buses and motorcycles; industrial activities;
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In the British coal mines of the 1800’s‚ jobs for women and children were harsh and unfavorable due to dangerous environments‚ long hours‚ and extremely heavy physical demand on the workers. The mines were fraught with opportunities to be hurt‚ as evidenced by the words of Robert North and the article “Women in the British Mines.” North shared how‚ while dragging buckets of coal using a girdle and chain‚ the straps cut into the children deeply enough that blood would run down‚ and that any who complained
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Air is the name given to atmosphere used in breathing and photosynthesis. Air supplies us with oxygen which is essential for our bodies. Air contains a variable amount of water vapor‚ on average around 1%‚ while air content and atmospheric pressure varies at different layers‚ air suitable for the survival of terrestrial plants and terrestrial animals is currently only known to be found in Earth’s troposphere and artificial atmospheres. Air is made up of 99% nitrogen‚ oxygen‚ water vapor‚ and inert
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Air Pollution Essay The Sources and Affects of Air Pollution (topic): Air pollution is the contamination of the air by noxious gases and small particles of solid and liquid matter in amounts that can cause harm to living organisms. Sources of air pollution include: transportation engines such as automobiles‚ power and heat generation‚ industrial processes‚ and the burning of solid waste. The combustion of gasoline and other fuels in automobiles‚ trucks‚ and jet airplanes produce the most common
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Air pollution is something that affects us every day whether we know it or not. The definition of air pollution occurs when the air contains gases‚ dust‚ fumes or odor in harmful amounts. That is‚ amounts which could be harmful to the health or comfort of humans and animals or which could cause damage to plants and materials. However; air pollution is something that can be prevented and is there are things that we as humans can do to better the environment. The human impact of air pollution is
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Nowadays‚ our community has many environmental problems‚ but the obviously problem is air pollution. People around the world‚ especially in the cities‚ see air pollution as an important problem because cause it makes many big effects such as worsens earth’s atmosphere and harms living creatures. Air pollution is created by both natural actions and humans activities‚ but mostly‚ air pollution is made by humans. The three principal causes that humans have done are burning fuels in vehicles‚ unsuitable
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need to determine if they should make or reject a certain decision by using marginal costs or benefits. Marginal costs refer to the change in cost over the change in quantity while marginal benefits refer to the change in benefits over the change in quantity (“Marginal Costs & Benefits”‚ n.d.). When it comes to a decision in purchasing a home‚ the strength of the economy could affect the marginal costs and the marginal benefits. During the times of economic growth‚ the consumer who purchases a
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Air Pollution Anthony Hampton Everest University Environmental Science There are many different types of air pollution‚ either way none of them are good for our health or our atmosphere. Air pollution has gotten worse through the years‚ the more factories we have and the cars we drive have had an impact on the earth. Smog is one of the types of air pollution‚ it is defined when smoke is present in the earth after emitting different sources. That is why
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Black Lung Many miners lose their lives each year‚ not just to accidents at mines‚ but also to the greatest threat to American miners: black lung disease (also known as Coal Worker ’s pneumoconiosis). Black lung is a disabling occupational lung disease caused by inhalation of excessive levels of respirable coal mine dust. The risk or the possibility of contracting the condition increases with continued exposure to coal mine dust. Chances are also raised in people over the age of 50. Even when preventive
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