Презентация по английскому языку на тему "Water pollution"

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  water pollution
  The project
  student 8"A" class
  secondary school No. 50
  Romanova’s Anastasia
  
  

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  «Water is the juice of life on Earth"
  Leonardo da Vinci
  

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  Water itself has no nutritional value, but it is an indispensable component of all living things. None of the living organisms of our planet cannot exist without water.
  For example: Without food a person can live about 50 days, if during the hunger strike he would drink fresh water, without water he won't survive the week will die in 5 days.
  

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  Water is the source of life, without which it is impossible to live. It is considered a symbol of purity and fertility. In all known legends life originated in water. Many years ago when people appreciated the mutual respect higher than gold, on the spring he had written:
  “Traveler, wait and bow. Spring water gives life to the young, old restores health, gives beauty and love of women...”.
  
  

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  But time goes on...
  

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  Currently in the world there are few rivers that would not be contaminated by products of human activity. With sewage in rivers are fertilizer and pesticides from agricultural land. And they get water out of the sewer and drainage ditches. Some plants is drained into rivers and lakes streams of dirty water. The pollution of rivers and lakes nitrate fertilizer grows on the planet almost every week. Unfortunately, even in that case, if to forbid the use of nitrate fertilizers tomorrow, the situation will deteriorate. Nitrates slowly for many years, seep through the ground into the rivers or lakes. Dirty waste water and fertilizers get into lakes and reservoirs and cause the rapid growth of slime — algae that choke the river fauna and flora
  The first time a clear causal linkage between bad water quality and impacts on human health was established in 1954
  

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  About two billion tons of waste water comprising a mixture of recycled fertilizers, sewage, industrial waste and waste generated as a result of human activity, discharged daily into rivers and seas causing the spread of diseases and causing irreparable damage to ecosystems. Therefore, the transformation of contaminated water from threats to health and the environment in a clean, safe and economically attractive resource is one of the key challenges for the global community in the twenty-first century.
  

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  Up to 2 million sea birds and 100 thousand marine animals die every year after swallowing any plastic products, chemical poisoned by the contaminated water, entangled in the ooze that grew because of biological contamination.
  

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  Contaminated water kills more people than war and all other forms of violence.
  "At least 1.8 million children under the age of 5 die from diseases associated with poor water, annually, that is one child every 20 seconds. Slightly less than half the hospitals in the world - people whose ailments are somehow related to contaminated water"
  

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  Water pollution
  Physical contamination  
  Chemical pollution
  Biological contamination
  Thermal pollution
  

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  Biological pollution is getting into water, together with wastewater of various pathogens (bacteria, viruses), fungal spores, eggs, worms, etc. the Main sources of biological pollutants are domestic waste water, businesses, sugar mills, meat - and wood industry etc. such Especially dangerous pollution of water bodies in recreation areas (resort areas of the coasts of seas and rivers).
  

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  Thermal pollution are effluents of heated water from power plants and nuclear power stations. An example of radiation contamination is the Chernobyl disaster.
  

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  Physical pollution is the increase in the content of water soluble substances and bodies (bottles, cans, packages, etc.) the result of human factors, washout by rain waters the soil from the fields, mining dust, stirred by the wind, etc.
  

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  Chemical pollution is released into the water various chemicals, wastes of various industries: petrochemical, pulp and paper and municipal sewage, waste from livestock farms, etc.
  

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  statistics
  

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  The most..
  Хуанхэ или Желтая река, Китай. Некоторые части реки настолько загрязнены, что вода не рекомендуется даже в промышленном использовании. Выбросы неизвестного происхождения окрасили даже
  River Buriganga, Bangladesh. Environmentalists call it a "dead river" due to its biological state. But even the ban does not stop the discharge into the river of industrial wastes.
  

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  Organization «DIRTYWATER»
  

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  Children's Fund United Nations whose primary purpose is to protect and promote the rights of children to safe, healthy and happy childhood, the rally was organized by DirtyWater("Dirty water") in new York.
  

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  Purpose: to draw people's attention to the problem of lack of clean water in African countries.
  

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  Implementation: On the street were vending machines where anyone can buy water for $1, as if infected with various dangerous diseases, like hepatitis or malaria. Actually water does not infected. But the water is stained and looks dirty.
  

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  Slogan: Only $ 1 is required to provide the child with clean drinking water for 40 days.
  

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  March 22 was declared world water day in 1992. Since then, in this day around the world held events to attract public attention to the problem of water pollution.
  

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  Thank you for your attention