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Any reported connection between electromagnetic fields, such

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Any reported connection between electromagnetic fields, such [#permalink] New post 07 Jun 2005, 23:27
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Any reported connection between electromagnetic fields, such as those produced by high-tension wires, and cancer is unsubstantiated. The cancer rate of urban residents is at least as high as that of people living in rural areas close to high-tension wires.

Which of the following, if true, would most severely damage the claim above?


(A) Most cancers are caused by interactions between biochemical and environmental factors.

(B) Although in many big cities the electrical system is hidden from view, residents of such cities may be living very close to the underground sub-stations of utilities, which produce strong electromagnetic fields.

(C) Electromagnetic fields are produced not only by high-tension wires but also by ordinary household appliances, such as microwave ovens and refrigerators.

(D) The cancer most often linked with electromagnetic fields is leukemia, which is incurable.

(E) Both big cities and areas near high-tension wires are not free of the myriad number of known cancer-causing agents.
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 [#permalink] New post 07 Jun 2005, 23:38
B.
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 [#permalink] New post 07 Jun 2005, 23:40
I'll pick B.
cancer rate of urban residents ~ people living in rural areas close to high-tension wires.

A) doesn't give much info
B) It says big cities also have strong electro magnetic waves. Thus weakening the claim.
C) It doesnot weaken the argument
D) doesn't give much info
E) It says both small & big cities are not free of myriad number of known cancer-causing agents.But we want in specific electro magnetic waves.
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 [#permalink] New post 08 Jun 2005, 01:14
The conclusion is that the connection between exposure to EM fields and cancer is not substantitated. We're also told the cancer rate of urban people is the same as that of those living in rural area near high tension cable (source of EM field). For this to be true, people living in urban area must also be exposed to EM fields. This is given in B.
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Re: CR-Electromagnetic field and cancer [#permalink] New post 08 Jun 2005, 04:31
(B) it is. We need a reason to say that indeed, EM fields cause cancer in urban cities. (B) does so.
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 [#permalink] New post 16 Jun 2005, 03:52
B...
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 [#permalink] New post 27 Jun 2005, 12:37
The answer is B
  [#permalink] 27 Jun 2005, 12:37
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