it does not become a danger to life.

　　27

　　, in some countries, waste from factories is still poured straight into rivers. People who use the water from one of these rivers often get

　　28

　　. The water

　　may become so polluted that it

　　29

　　all the fish in the river. When these rivers finally reaches the

　　30

　　, it pollutes the ocean.

　　In many countries with

　　31

　　, human waste is piped directly into the sea without being dealt with. This is not

　　32

　　. Although the sea itself can break up the waste, beaches

　　33

　　become polluted.

　　34

　　scientists suggest people take the waste far out to sea in ships where the wind and waves break it down.

　　In 1989 an international law was passed to

　　35

　　people putting waste into the sea. It is now against the

　　36

　　to put anything into the sea nearby. Such rubbish as plastics may not be thrown

　　37

　　the sea anywhere. Other waste may be put into the sea, either 19 or more than 40 kilometers from land,

　　38

　　the nature of the materials.

　　The

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