Презентация 10 класс "Проблемы экологии"

ECOLOGICAL PROBLEMS

Ecology Today

Ecological problems

• Air pollution
• Water pollution
• Soil pollution

INTRODUCTION

• Since ancient times Nature has served Man, being the source of his life. For thousands of years people lived in harmony with environment and it seemed to them that natural riches were unlimited. But with the development of civilization man's interference in nature began to increase.
• Large cities with thousands of smoky industrial enterprises appear all over the world today. The by-products of their activity pollute the air we breathe, the water we drink, the land we grow grain and vegetables on.

Ecological problems

People always polluted their surroundings. But until now pollution was not such a serious problem. Today our planet is in serious danger. Acid rains, global warming, air and water pollution, and overpopulation are the problems that threaten human lives on the Earth.

Every year world industry pollutes the atmosphere with about 1000 million tons of dust and other harmful substances. Many cities suffer from smog. Vast forests are cut and burn in fire. As a result some rare species of animals, birds, fish and plants disappear forever, a number of rivers and lakes dry up.

Air pollution

Billions of tons of coal and oil are consumed around the world every year. When these fuels are burnt, they produce smoke and other by-products, which are emitted into the atmosphere. The pollution from power plants and automobiles As a result we have smog, mixture of fog and smoke.. . But polluted air can cause illness, and even death.. These emissions have disastrous consequences for our planet. They are the main reason for the greenhouse effect and acid rains.

WATER POLLUTION

The seas are in danger. They are filled with poison: industrial and nuclear wastes, chemical fertilizers and pesticides. If nothing is done about it, one day nothing will be able to live in our seas. Polluted water kills fish and other marine life.

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SOIL POLLUTION

Sewage dump and emitted tons of harmful chemicals destroyed soil On polluted soil, food can not be grown A great damage has been done to the agriculture, forests and people's health as the consequences of the explosion at the atomic power-station after the Chernobyl tragedy in April 1986. that was a tragic for the Ukrainian, Byelorussian and other nations About 18 percent of the territory of Belarus was also polluted with radioactive substances.

Thank you for your attention!