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coal mining

by rahul.s » Sun Jan 31, 2010 11:38 pm
The removal of hillsides and mountaintops, necessary for mining companies to extract coal quickly from deeply-buried seams, destroys forests. Experts therefore recommend that coal be extracted using time-consuming deep bore techniques.

Because public opinion opposes coal mining, some states now allow mining companies to extract coal from any particular site for only a short period of time.

The statements above, if true, best support which of the following conclusions?

(A) Mining companies will continue to be able to extract coal using deep bore techniques but not by removing hillsides or mountaintops.

(B) The only way to preserve forests on hillsides and mountaintops is to stop coal mining.

(C) New mining techniques will be developed to make it possible to extract coal quickly without removing hillsides or mountaintops.

(D) Public opinion regarding coal mining works against forest preservation efforts.

(E) Allowing mining companies to extract coal from any particular site for only a short period of time is unlikely to be a successful response to public opinion.

OA: D
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by thephoenix » Mon Feb 01, 2010 12:11 am
rahul.s wrote:The removal of hillsides and mountaintops, necessary for mining companies to extract coal quickly from deeply-buried seams, destroys forests. Experts therefore recommend that coal be extracted using time-consuming deep bore techniques.

Because public opinion opposes coal mining, some states now allow mining companies to extract coal from any particular site for only a short period of time.

The statements above, if true, best support which of the following conclusions?

to extract coal quickly from deeply-buried seams = to destroys forests
Experts therefore recommend=use time-consuming deep bore techniques.

Because public opinion opposes coal mining=mining companies are allowed to extract coal for only a short period of time.
THE above line implies that bcoz of public opposing contractors are forced to operate for only a short period of time , and therfore are forced to use quick method which will destroy forests

hence public opinion is encouraging deforestation

which is option D
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by vijay_venky » Tue Feb 02, 2010 2:49 am
Both statements in the argument when evaluated independently look like

STMT 1
P1. rmvl of hs and mt --> destroys forests
P2. rmvl of hs and mt --> necessary for quick extraction of coal
P3. experts recommend --> time-consuming technique.
so in effect preserve forests (experts) --> time consuming extraction

STMT 2
P1. Public opinion --> opposes coal mining
P2. some states --> allow coal extraction for shorter periods
P1 caused P2.
so in effect Public Opinion --> shorter periods, which is counter to the experts opinion.

The best option is C
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