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Инфоурок / Иностранные языки / Презентации / Презентация " Environmental problems"
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Презентация " Environmental problems"

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материалов
At night between 25 and 26 April 1986, a nuclear station near a small Ukraini...
Currently, a new National Programme  is drafted for the mitigation of Cherno...
Not only Chernobyl but many of our «peaceful» factories and towns cause a gre...
 Global warming  Global warming process of the gradual increase fair-annual t...
The hole in the ozone layer Ozone absorbs harmful ultraviolet radiation which...
Land degradation Water and wind erosion are now the two primary causes of lan...
During the 17th and 18th centuries, Easter Island experienced severe erosion...
The loss of soil fertility due to erosion is further problematic because the...
Prevention and remediation The most effective known method for erosion preven...
Results As many as 159 countries — members of the UNO have set up environment...
13 1

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№ слайда 4 At night between 25 and 26 April 1986, a nuclear station near a small Ukraini
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At night between 25 and 26 April 1986, a nuclear station near a small Ukrainian town of Chernobyl was affected by the largest-scale radiation-related manmade catastrophe in the history of humankind. The devastating tragedy left around five million suffering who lived in the area encompassing five thousand towns and villages of today’s Belarus, Russia and Ukraine… Radioactive cesium and strontium with half-life of 28 and 30 years contaminated around 150,000 square kilometers across the territories of the three countries. A total of 17 European countries were affected by the radioactive fall-outs.

№ слайда 5 Currently, a new National Programme  is drafted for the mitigation of Cherno
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Currently, a new National Programme  is drafted for the mitigation of Chernobyl after-effects for the years 2011-2015. Its major goal will be to rehabilitate and develop the affected areas socially and economically, maintain the required level of safety for the suffering citizens and radiation safety. The principal task of the current programme is to move away from the rehabilitation efforts in most critical directions of the mitigation towards social and economic revival and sustainable development of the affected areas.

№ слайда 6 Not only Chernobyl but many of our «peaceful» factories and towns cause a gre
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Not only Chernobyl but many of our «peaceful» factories and towns cause a great damage to the environment. Dangerous dust and blow-outs of the enterprises are being carried out by winds for long distances destroying the life around. People all over the world are worried about what is happening to the environment. They understand that the earth is their home, a big green home. The environment protection should be our universal concern. 

№ слайда 7  Global warming  Global warming process of the gradual increase fair-annual t
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 Global warming  Global warming process of the gradual increase fair-annual temperature of the atmosphere of the Land and World ocean.    The Scientist were defined: uncontrolled surges in atmosphere and other thoughtless behaviour of the person was a reason of the steady change the climate, capable completely to change the planet. The Danger of the global catastrophe has acknowledged the government and folk of the developed countries of the world.

№ слайда 8 The hole in the ozone layer Ozone absorbs harmful ultraviolet radiation which
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The hole in the ozone layer Ozone absorbs harmful ultraviolet radiation which is produced by the Sun. Ultraviolet radiation can damage cells of living things- plants, animals and people. The damage of ozone has been caused by complex chemical reactions involving chlorine and bromine.

№ слайда 9 Land degradation Water and wind erosion are now the two primary causes of lan
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Land degradation Water and wind erosion are now the two primary causes of land degradation; combined, they are responsible for 84% of degraded acreage. Each year, about 75 billion tons of soil is eroded from the land—a rate that is about 13-40 times as fast as the natural rate of erosion.  Approximately 40% of the world's agricultural land is seriously degraded. According to the United Nations , an area of fertile soil the size of Ukraine is lost every year because of drought, deforestation and climate change.  In Africa, if current trends of soil degradation continue, the continent might be able to feed just 25% of its population by 2025, according to UNU's Ghana-based Institute for Natural Resources in Africa.

№ слайда 10 During the 17th and 18th centuries, Easter Island experienced severe erosion
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During the 17th and 18th centuries, Easter Island experienced severe erosion due to deforestation and unsustainable agricultural practices. The resulting loss of topsoil ultimately led to ecological collapse, causing mass starvation and the complete disintegration of the Easter Island civilization.

№ слайда 11 The loss of soil fertility due to erosion is further problematic because the
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The loss of soil fertility due to erosion is further problematic because the response is often to apply chemical fertilizers, which leads to further water and soil pollution, rather than to allow the land to regenerate.

№ слайда 12 Prevention and remediation The most effective known method for erosion preven
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Prevention and remediation The most effective known method for erosion prevention is to increase vegetative cover on the land, which helps prevent both wind and water erosion. Terracing is an extremely effective means of erosion control, which has been practiced for thousands of years by people all over the world.

№ слайда 13 Results As many as 159 countries — members of the UNO have set up environment
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Results As many as 159 countries — members of the UNO have set up environmental protection agencies. Numerous conferences have been held to discuss questions of ecologically poor regions including the Aral Sea, the South Urals, Kuzbass, Donbass, Semipalatsinsk and Chernobyl.


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Дата добавления 28.02.2016
Раздел Иностранные языки
Подраздел Презентации
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Номер материала ДВ-490705
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