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Submitted by gunjan on June 11, 2005
Category: English
Words: 1879 | Pages: 8
Views: 182
Popularity Rank: 63,642
Average Member Grade: N/A (Add a Comment / Grade this Paper)
Pollution
The first thing people see, in the morning, when they walk outside is the
sky and the colored sun. Is this world giving us the privilege of seeing the natural
colors of the earth and sun through all the layers of pollution within the air? Not
only are beautiful sights such as this hidden behind the pollution this world
causes everyday, but an increase in diseases, infections and death occurs.
What causes pollution? What can we do to prevent it, and get rid of it?
Air pollution is the presence in the atmosphere of harmful gases, liquids,
or solids. Air pollution, known as smoke pollution for many years, resulted from
coal combustion. Smog has been a problem in coal-burning areas for several
centuries. Smog finally decreased when coal combustion was replaced by oil
and gas combustion. Air pollution is caused by a number of different types of
pollutants.
The first type, particulate matter, consists of solid and liquid aerosols
suspended in the atmosphere. These arise from the burning of coal and from
industrial processes. Atmospheric particles can scatter and absorb sunlight
which reduces visibility. Particles also reduce visibility by attenuating the light
from objects and illuminating the air causing the contrast between the objects
and their backgrounds to reduce. Not only does it effect visibility, but it hastens
the erosion of building materials and the corrosion of metals, interferes with the
human respiratory system, and brings toxic materials into the body. The small
particles cause chronic bronchitis, bronchial asthma, emphysema and lung
cancer. The second type is sulfur oxides which come from the burning of coal
and industrial processes. Damage to materials, to vegetation, and to the human
respiratory system are caused by the acid nature of oxides. Small quantities...
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