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Many rivers and lakes around the world are
polluted. The discharge of ___1___
materials by factories and households ___2___
pollution to rivers and lakes. The Rhine River in
Europe and the Great Lakes in North America ___3___
good examples of a river and lakes that are
polluted. Their ___4___
cannot be drunk.
The ___5___
thing is happening to the sea. In ___6___
instance, certain factories in Japan dumped
industrial waste ___7___
the sea. Many people suffered ___8___
lead or mercury poisoning ___9___
eating fish caught in such polluted waters.
Pollution in certain areas of the sea ___10___
now reaching dangerous levels. Many ships discharge
their waste materials ___11___
unwanted engine oil into the sea. These wastes ___12___
lead and mercury which are poisonous. Sometimes,
accidents ___13___
oil tankers can cause oil to be discharged into the
sea and ___14___
the beach.
In ___15___
to discharge from factories and sewers, pollution
can also come about as a ___16___
of politics. Individuals ___17___
want power deliberately place the living things in
the sea ___18___
risk. In a recent example, many barrels of oil were
deliberately ___19___
into the Gulf to ___20___
ships and soldiers from attacking the annexed shores
of Kuwait.
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