The Sea of Azov has been one of the most productive of the world. There were much fish in our bazars and supermarkets. The Sea of Azov gave us nearly. - презентация

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2 The Sea of Azov has been one of the most productive of the world. There were much fish in our bazars and supermarkets. The Sea of Azov gave us nearly 1/5 part of all catches of the inside reservoirs of our country. But unfortunately there are less big fish and there are more small one.

3 Past Present The Sea of Azov is one of The productivity of the productive seas of the world sea is decreased Past Present The Sea of Azov is one of The productivity of the productive seas of the world sea is decreased

4 There were some reasons why the sea of Azov was so productive in the past. t the sea was not deep, water was lighted and heated and it was enriched by oxygen. Rivers brought much nutritious things The sea was not salted % Problem: Can we stop the drop of the seas productivity and to restore it?

5 Our scientists came to the conclusion that the main reasons are : Pollution of the sea Increasing of saltness till % ( so the temperature of waters freezing is decreased and it leads to the destruction of fish.

6 The main reasons of decreasing of fish are: -Our coast was the ancient settlement of the coast. - Saltness of the sea is increased. -Biology pollution. -Industry pollution. -Agricultural pollution. -Oil pollution.

7 It is necessary to take the next measures: To control the drainage of cities and towns; To refuse of using chemical weed-killers and pest-killers; To make ecology control in our ports and sea transport; To breed valuable species of fish; To decrease saltness of the sea.

8 Decreasing of saltness is a way that needs much financial expenditure, but it leads to the restoration of nature. So we can say that the restoration of the seas productivity is important and possible. So we can say that the restoration of the seas productivity is important and possible.