Презентация - Ecological problems
Текст этой презентации
" The protection of nature has become one of the most burning problems of the 21th century."
The protection of nature has become one of the most burning problems of the 21th century.
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.
With the development of civilization man's interference in nature began to increase. The by-products of people's activity pollute the air we breathe, the water we drink, the land we grow grain and vegetables on. With the development of civilization man's interference in nature began to increase. The by-products of people's activity pollute the air we breathe, the water we drink, the land we grow grain and vegetables on.
The most polluted is air, water and land now. People dont think about the consequences of their activities. We must solve environmental problems without harming nature.
The level of water treatment is extremely low By water pollution distinguished: chemical physical (thermal, radiation); biological (microbial). To ensure the required water status of natural water bodies need to develop and implement measures to protect water.
Air pollution is a problem the 21st century. Main pollutants are emissions to air pollutants. The government must control of gases emission, which damage the ozone layer.
Deforestation Vast forests are cut and burn in fire. Their disappearance upsets the oxygen balance. As a result some rare species of animals, birds, fish and plants disappear forever, a number of rivers and lakes dry up.
Land Contamination of soils also occur as a result of agricultural practices, pesticides pesticide residues unused fertilizer.
The most horrible ecological disaster befell Ukraine and its people after the Chernobyl tragedy in April A great damage has been done to the agriculture, forests and people's health. The consequences of this explosion at the atomic power-station are tragic for the Ukrainian, Byelorussian and other nations.
Take care of nature - it is our home
Галимуллина Александра 9-Г класс
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