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Although ice particles in the upper atmosphere benefit Earth

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Director
Joined: 03 Sep 2006
Posts: 864

Kudos [?]: 1105 [0], given: 33

Although ice particles in the upper atmosphere benefit Earth [#permalink]

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10 Jun 2007, 00:57
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Although ice particles in the upper atmosphere benefit Earth in that they reflect and absorb solar radiation,acting as a global thermostat and thus keeping Earth from either burning up or freezing over, they also accelerate the destruction of the ozone layer by reacting with chlorofluorocarbons (CFC's ).

A.

B. acting as a global thermostat and thus keeping Earth either from burning up or freezing over, while also accelerating

C. act as a global thermostat and thus keep Earth from either burning up or freezing over, while also accelerating

D. they act as a global thermostat that thus keeps Earth either from burning up or freezing over, even though it also accelerates

E. they act as a global thermostat to thus keep Earth from either burning up or freezing over, but they also accelerate

Kudos [?]: 1105 [0], given: 33

Senior Manager
Joined: 11 May 2004
Posts: 327

Kudos [?]: 25 [0], given: 0

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10 Jun 2007, 03:17
LM wrote:
Although ice particles in the upper atmosphere benefit Earth in that they reflect and absorb solar radiation,acting as a global thermostat and thus keeping Earth from either burning up or freezing over, they also accelerate the destruction of the ozone layer by reacting with chlorofluorocarbons (CFC's ).

A.

B. acting as a global thermostat and thus keeping Earth either from burning up or freezing over, while also accelerating

C. act as a global thermostat and thus keep Earth from either burning up or freezing over, while also accelerating

D. they act as a global thermostat that thus keeps Earth either from burning up or freezing over, even though it also accelerates

E. they act as a global thermostat to thus keep Earth from either burning up or freezing over, but they also accelerate

A..

Although, needs negative statement.
Ice Particles need 'they' and not 'it'

B, C, D - out.
E -- not right explaining the negative statement

A - perfect.

Kudos [?]: 25 [0], given: 0

Director
Joined: 03 Sep 2006
Posts: 864

Kudos [?]: 1105 [0], given: 33

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12 Jun 2007, 22:47
OA is "A".

Kudos [?]: 1105 [0], given: 33

12 Jun 2007, 22:47
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Although ice particles in the upper atmosphere benefit Earth

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