87 -The author believes that ---- .
A) we can easily find the chemicals used by Houdini anywhere in the world
B) the people in the West no longer like magical performances
C) Westerners are more interested in their safety now than, In the past
D) Houdini took the secrets of his craft to India before he died
E) chemicals needed by magicians should be freely available to everyone
There are two kinds of water pollution. The first is when rubbish, sewage or chemicals are thrown
into the water. This waste upsets the natural environment and can prove dangerous or fatal to fish and
other life in the water. The second type of pollution is thermal, or warm water pollution. This is most
commonly caused by hydroelectric power plants. These take water from a lake or river, convert it
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