完形填空。
How to get rid of waste is a great problem for the world today. Waste must be treated
1 it does not
become a danger to life.
2 , in some countries, waste from factories is still poured straight into rivers.
People who use the water from one of these rivers often get
3 . The water may become so polluted that
it
4 all the fish in the river. When these rivers finally reaches the
5 , it pollutes the ocean.
In many countries with
6 , human waste is piped directly into the sea without being dealt with. This
is not
7 . Although the sea itself can break up the waste, beaches
8 become polluted.
9 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
10 people putting waste into the sea. It is now against the
11 to put anything into the sea nearby. Such rubbish as plastics may not be thrown
12 the sea anywhere.
Other waste may be put into the sea, either 19 or more than 40 kilometers from land,
13 the nature of the
materials.
The
14 of dealing with waste has become so great that several international organizations have been
15 to protect the world and control pollution.
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