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into steam for running the plant's turbines, change the steam back into water, then return the
water to the original lake or river. Though this water is no dirtier than when it was taken out, it is
often five to ten degrees above its original temperature. This causes a change in the environment
which can be as dangerous to, aquatic life as waste 'pollution.
88 -It is stated In the passage that ---- .
A) thermal pollution is more dangerous than pollution from rubbish or chemicals
B) warm water pollution Is as harmful as thermal pollution
C) hydroelectric plants put dirty water back into the environment
D) thermal pollution occurs when the temperature of a river or lake is raised
E) aquatic life is merely disturbed by thermal pollution
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