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قديم 10-08-2012, 03:22 PM
الصورة الرمزية My TimE iS NoW
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تاريخ التسجيل: Feb 2010
المشاركات: 27,487
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افتراضي ملوثات البيئة وطرق معالجتها - ملوثات البيئة الصرف الصحي وطرق معالجتها - ملوثات البيئة وطرق معالجتها الدخان






ملوثات البيئة وطرق معالجتها - ملوثات البيئة الصرف الصحي وطرق معالجتها - ملوثات البيئة وطرق معالجتها الدخان

اسباب تلوث البيئه و طرق معالجتها..
..Cause environmental pollution and how to address them

Introduction
We all create pollution therefore everyone can make a difference to reduce pollution. Although it may seem like it is difficult to stop pollution, there are lots of things that can be done every day to reduce or eliminate pollution altogether


?What is Pollution
ما هو التلوث؟

,Every day we pour or release harmful substances such as poisonous gases
chemicals and garbage into our environment. These harmful substances that
end up damaging the environment, are called pollution. Most pollution
comes from factories and transportation but as you will see we all
.contribute to it in many different ways



All pollution is waste. Waste is unwanted or discarded material and when
it is released into the environment it becomes pollution. When most
people think of waste they think of garbage or trash that is littered all
over the land. This type of waste is the one that most people are
familiar with and it is commonly called solid waste. But solid waste
pollution is not the only type of pollution out there. Can you think of
?other types

In addition to solid waste there is air pollution, water pollution, soil
pollution and even noise pollution. As you will see, if not handled
properly, pollution can and has contaminated our air, water, soil and
.land


Air Pollution
تلوث الهواء

Every living creature relies on clean air to survive. Air is made up of a
mixture of gases, mainly oxygen and nitrogen, with small amounts of
carbon dioxide plus water. Air has no colour or smell, except when it is
polluted. Dirty air can affect the health of humans, animals, plants and
can even damage buildings. Industry and transportation produce most of
the air pollution, releasing millions of tons of harmful substances into
.the environment each year



The burning of fossil fuels (coal and oil) is the source of or generates
most of the world's energy. Unfortunately it also generates most of the
world's air pollution. That is because when we burn the fossil fuels to
produce energy we end up releasing waste in the form of toxic gases.
Carbon monoxide, carbon dioxide, nitrogen oxides and sulphur dioxides are
some of the most dangerous gases produced during the burning of fossil
.fuels

Carbon dioxide gases play a big role in the greenhouse effect by trapping
heat rather than allowing it to escape into space. It is not just what is
released into the air that causes problems; it is also how individual
,pollutants interact with each other, water and/or sunlight. For example
sulphur dioxide and nitrogen oxide are both dangerous when they combine
.with other substances to create problems such as smog and acid rain

.Gases are not the only air pollutants that we should be concerned about
Tiny bits of dust, ****l, soot and other materials also find their way
into the atmosphere from manufacturing plants, construction sites, wood
burning stoves and cars. These small particles reduce the quality of the
.air that we breathe



Also, sometimes rain contains chemicals called acids that can harm the
,environment including plants and animals living on land and in the water
as well as damage buildings and other manmade structures such as
monuments, roads and vehicles. Acids cause so much harm because they can
burn into materials. Acid rain forms when sulphur dioxide and nitrogen
dioxide (produced by burning fuels) are released into the air. These two
gases mix with water to form a weak acid which falls as rain. The gases
that cause acid rain are released by power plants, factories and
transportation. Acid rain falls to the ground and is taken up by tree
roots, eventually causing the trees to die. The acid rain will also
.affect the plants and animals living in rivers and lakes


Water Pollution
تلوث المياه

In addition to clean air, all animals and plants need a clean water
supply in order to survive. You may think that we have lots of water but
only a small amount of it is freshwater that we can use and we are
.polluting our water in the same way we are polluting our air

When harmful substances such as oil and chemical wastes enter the
waterways either through accidents or through being intentionally dumped,
they are soon carried away by tides or the flow of the river and are
extremely difficult to remove. As a river makes it's way to the ocean, a
number of different chemicals can enter its waters. Harmful chemicals can
enter our rivers and lakes from any number of sources. For example they
can seep out of dumpsites or pesticides and fertilizers may drain from
farmlands or they may find their way into sewage that is pumped from
local towns and cities

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