Презентація на тему «Ecological Problems» (варіант 6)

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Слайд #1

Ecological Problems. Natural disasters

Слайд #2

Natural disasters

Слайд #3

“Eco” means “home" in Latin language. It's a science about our mutual home – about nature.
Science, which teachers us to treat very carefully to our homeland.
What does it mean “Eco”?

Слайд #4

Environment – is surroundings we live in.

Слайд #5

Ecological problems
Air pollution
Water pollution

Слайд #6

Ecological problems
Soil pollution
Famine

Слайд #7

Air pollution is a very serious problem, because polluted air can cause illness and even death. Every year world industry pollutes the atmosphere with about 1500 million tons of dust and other harmful substances. Many cities suffer from smog, the oxygen balance upsets. Cars are polluting the air by exhaust gases and other dangerous chemicals.
Air pollution

Слайд #8

Virtually not only human beings pollute the air but nature itself can cause damage,for example volcanic eruptions. But the consequences after volcanic eruptions aren't so harmful as human beings , in contrast to human activities, these processes are always reversible – thought after a while the atmosphere will recover in former structure.

Слайд #9

Water pollution
Water recourses is one of the main factor of existing life in our planet.
People use fresh water for their needs. It is more than 2% of hydrosphere volume.
First of all water pollution is the result of industrial, agricultural and everyday necessities discharge of wastes into rivers, lakes and seas.
The main part of water pollution plays a large number of oil industry wastes.

Слайд #10

The main component of the Earth biosphere represents topsoil.Soil is polluted by: litter, wastes, heavy metals, pesticides, radioactive elements.Sinking aerosol may contain heavy poisonous metals and it may lead to plants' ruin.
Soil pollution

Слайд #11