What can you say about the ecological problems of the Caspian Sea? 

Example: I think the water is polluted.
If pollution increases increases fish will die.

1.)
2.)
3)
4)
5)

1) A lot of plants and factories contaminate the Caspian Sea, thats why all of the alive organisms are dying

2) Alco people waste water in the Caspian Sea for their own problems, for example, car washing, drinking, etc.

3) After this, from Caspian Sea people  take a lot of oil, and tankers, that transport oil can be broken, and all of oil will fill to the sea.

4) Most of the fishes in this sea died because of  poaching.

5) Most of the fishes in the Caspian Sea ill, because in the sea live one bactery, which can be cause of the illness