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Англ.яз. Метод.указ. Троицкой Е.С. Ecology Basi....doc
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Pollution

Pollution is a major problem all around the world. It has adversely affected the lives of millions of people and caused many deaths and health disorders.

Pollution is contamination by a chemical or other agent that renders part of the environment unfit for intended or desired use. It deserves emphasis that the environment also refers to the place where you live. Natural processes have released toxic chemicals into the environment throughout the history of the earth. Currently, the pollution generated by human activities presents the most serious problem.

Pollution can take two major forms: local pollution and global pollution. In the past, only local pollution was thought to be a problem. In recent decades, awareness has been rising that some forms of pollution pose a global problem. For example, human activity (primarily nuclear testing) has significantly raised the levels of background radiation, which may lead to human health problems, all over the world.

Traditional forms of pollution include air pollution, water pollution, soil pollution and radioactive contamination while a broader interpretation of the word has led to the ideas of ship pollution, light pollution, and noise pollution.

Some of the major causes of pollution are as follows:

I) Deforestation - For the establishment of factories, industries and due to urbanization in various parts of the world, trees are cut on a large scale without any adequate efforts to plant new trees. This leads to deforestation, which has caused a rise in the pollution levels.

II) Polluted water - one of the reasons that the water pollution problem is so severe is that it is not actually illegal to dump pollutants into water bodies. Sewage, sludge, garbage, and even toxic pollutants are all dumped into the water. In addition to sewage, chemicals dumped by industries and governments are another major source of water pollution. People in Developing/Undeveloped countries also pollute rivers by using the water in these rivers for washing clothes, utensils, bathing and other activities. Oil spills also pollute oceans around the world.

III) Noise pollution - the machines used in factories make noise throughout the day, and this disturbs the peaceful atmosphere in the vicinity, as machines used without proper covering lead to noise pollution. This puts heavy mental strain on the people staying in the nearby areas.

IV) Air pollution - though some pollution comes from natural sources (such as, forest fires, volcanic eruptions, erosion, pollen dispersal, evaporation of organic compounds etc), most pollution is the result of human activity. The biggest causes are the operation of fossil fuel-burning power plants and automobiles that combust fuel. Combined, these two sources are responsible for about 90% of all air pollution in the world.

V) Soil pollution - dumping of wastes in many areas is a major cause of soil pollution. Pollution is also caused by iron and steel mills; municipal incinerators; oil refineries; cement plants; etc.

The effects of environmental pollution are diverse and numerous. Pollution affects people’s health. Pollutants are thought to play a part in a variety of diseases, including cancer, lupus, immune diseases, allergies, and asthma. Nature is affected by pollution as well. Pollution kill animals and plants, disrupts the natural food chain. It can also severely change or destroy ecosystems.

Pollution has many disastrous effects that need to be curbed. In order to accomplish this, governments, scientists and environmentalists are searching, using or testing a variety of methods aimed at reducing pollution. There are two main types of pollution control. Input control involves preventing a problem before it occurs, or at least limiting the effects the process will produce (e.g., people may try to restrict population growth, use less energy, reduce waste, etc). Output control, the opposite method, seeks to fix the problems caused by pollution. This usually means cleaning up an area that has been damaged by pollution.

Input controls are usually more effective than output controls. Output controls are also more expensive.

Awareness among masses, regarding the adverse effects of pollution around the world, can also help in reducing the intensity of pollution. This awareness can be created through various media like newspapers, television, radio, flyers, seminars, etc.

It is high time that we take this issue, of «Problems of Pollution» seriously, or it could have adverse effects on our future generations.

9. Read the statements and decide whether they are true or false. Correct the false ones. Express agreement using That’s right or Quite so and disagreement I can’t agree with you or On the contrary.

1. Environmental pollution has become a major problem all around the world.

2. All the causes of pollution can be divided into two types: natural and human-based.

3. Pollution makes environment unfit for intended or desired use.

4. In the past, only global pollution was thought to be a problem.

5. It is illegal to dump pollutants into water bodies.

6. Most pollution comes from natural sources.

7. Output control involves preventing a problem before it occurs.

8. Input controls are usually less effective than output controls.