Enviromental Enviromental ideasideas

BĚŤÁKOVÁ ZUZANABĚŤÁKOVÁ ZUZANA

NAVRÁTILOVÁ JANANAVRÁTILOVÁ JANA

Everything in our Everything in our surrounding water, surrounding water, air, trees, natural air, trees, natural resources… is our resources… is our environment.Our environment.Our planet has many planet has many ecological ecological problems. problems.

OZONE HOLEOZONE HOLE This satellite This satellite

photograph shows the photograph shows the hole in the ozone layer hole in the ozone layer over Antarctica.The over Antarctica.The hole is pink.hole is pink.

The ozone layer stops The ozone layer stops some of the UV some of the UV radiation from the sun.radiation from the sun.

Too much ultraviolet radiation causes sunburn and skin cancer.

CFCs in the atmosphere have caused CFCs in the atmosphere have caused the hole. the hole.

Scientists first discovered the hole in Scientists first discovered the hole in 1982, and it is getting bigger.1982, and it is getting bigger.

Thirty per cent of CFCs come from Thirty per cent of CFCs come from aerosol cans, thirty per cent from aerosol cans, thirty per cent from fridges and air conditioning, and thirty fridges and air conditioning, and thirty per cent from the manufacture of per cent from the manufacture of some plastic products.some plastic products.

THE GREENHOUSE EFFECT THE GREENHOUSE EFFECT

During the last 100 During the last 100 years we have years we have produced a huge produced a huge amounth of carbon amounth of carbon dioxide.dioxide.

The carbon dioxide The carbon dioxide in the atmosphere in the atmosphere works like the works like the glass in a glass in a greenhouse.greenhouse.

Where does the carbon dioxide Where does the carbon dioxide come from?come from?

People and animals breathe in oxygen, People and animals breathe in oxygen, and breath out carbon dioxide.and breath out carbon dioxide.

Trees take carbon dioxide from the air, Trees take carbon dioxide from the air, and produced oxygen.and produced oxygen.

We produced carbon dioxide when we We produced carbon dioxide when we burn coal, oil,petrol,gas..or wood.burn coal, oil,petrol,gas..or wood.

In the last few years people have In the last few years people have burned huge areas of rain forest.burned huge areas of rain forest.

This means there are fewer This means there are fewer trees,and,of course,more carbon trees,and,of course,more carbon dioxide.dioxide.

A hotter earth

Scientists think the greenhouse Scientists think the greenhouse effect will make the world hotter.effect will make the world hotter. The scientists from NASA The scientists from NASA

have been observing the have been observing the temperature changes of temperature changes of the Earth through the the Earth through the satellites for more than 18 satellites for more than 18 years. The data show us years. The data show us increasing tendency of the increasing tendency of the land surface temperature land surface temperature in average: 0,43 degrees C in average: 0,43 degrees C per 10 years.per 10 years.

It is caused because some It is caused because some areas are getting warm areas are getting warm more, some less and in more, some less and in some regions in north some regions in north America and Asia the America and Asia the climate was continually climate was continually getting colder.getting colder.

Acid rains

•Substances such as SO2 a NO can cause major changes in the enviromental.These substances mix with water vapour in the atmosphere and form sulphuric acid and nitric acid.

•Sunlight turns these acids into poisonous oxidants which fall in the form of rain (acid rain) or snow onto trees and gradually kill them.

The situation in the Czech The situation in the Czech republicrepublic

The worst problem is air pollution.The worst problem is air pollution. Factories fill the air with smelly and Factories fill the air with smelly and

dangerous smoke. In parts of country dangerous smoke. In parts of country especially in Norhtern Bohemia,Prague especially in Norhtern Bohemia,Prague and around Ostrava people have many and around Ostrava people have many health problems.health problems.

Next big problem is destruction of Next big problem is destruction of nature.Industry and increasing population nature.Industry and increasing population have destroyed many forests this problem have destroyed many forests this problem is called deforestation.is called deforestation.

Thank you for your attentionThank you for your attention

The biggest source of information:The biggest source of information: www.priroda.czwww.priroda.cz www.bbc.co.comwww.bbc.co.com www.google.comwww.google.com www.greenpeace.comwww.greenpeace.com