Презентация, доклад на тему Ecological Problems

PREPARED BY GNENNAYA LYUDMILA

mean “Eco”?

“Eco” means “home" in Latin language. It’s a science about our mutual home – about nature.
Science, which teaches us to treat very carefully to our homeland.
Environment – is surroundings we live in.

admitted that their health was depending on the state of surroundings. But only in the XX century humanity, in full measure, realized , that many diseases are closely connected with the air and water pollution and inferior products.

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.

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.

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.

polluted by: litter, wastes, heavy metals, pesticides, radioactive elements.
Sinking aerosol may contain heavy poisonous metals and it may lead to plants’ ruin.

purification territorial systems.