Слайд 3
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.
Слайд 4
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.
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.
21st century. Main pollutants are emissions to air pollutants.
The government must control of gases emission, which damage the ozone layer.
Слайд 9
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.
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Land Contamination of soils also occur as
a result of agricultural practices, pesticides pesticide residues unused
fertilizer.
Слайд 11
The most horrible ecological disaster befell Ukraine
and its people after the Chernobyl tragedy in April
1986. 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.