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18 Dec 2015, 02:49
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B
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Difficulty:
25%
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Question Stats:
77% (01:49) correct
23%
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wrong
based on 408
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The use of a wood harvesting technique known as clear cutting has had two especially insidious environmental impacts. The first is that it causes erosion, as hillsides that were covered with mature trees are abruptly exposed to the full impact of the elements. The second is that when new trees grow in the area they are often nearly all of the same age and species and therefore highly susceptible to disease and insect infestation.
From the passage above, it can be properly inferred that wood harvesting can continue with fewer negative impacts if which of the following techniques is employed?
(A) Waiting longer periods between harvests so that the trees will be larger when cut.
(B) Using selective harvesting techniques that leave some mature trees standing.
(C) Spraying areas that are clear cut with an insecticide to prevent infestation.
(D) Leaving some areas uncut, such as those near state parks and along roadsides.
(E) Planting monocultures, a single species of fast growing tree, in areas that have been clear cut.
From the passage above, it can be properly inferred that wood harvesting can continue with fewer negative impacts if which of the following techniques is employed?
(A) Waiting longer periods between harvests so that the trees will be larger when cut.
(B) Using selective harvesting techniques that leave some mature trees standing.
(C) Spraying areas that are clear cut with an insecticide to prevent infestation.
(D) Leaving some areas uncut, such as those near state parks and along roadsides.
(E) Planting monocultures, a single species of fast growing tree, in areas that have been clear cut.
18 Dec 2015, 04:53
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Gnpth
the two points to look into are;-
1) abrupt exposure
2) new trees of same age and species..
therefore if we leave few mature trees standing, both the above points can be addressed
B
18 Dec 2015, 08:28
Kudos
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Wood harvesting causes two issue
1) exposure
2) same kind of trees and therefore susceptible to diseases
fix can be like
1) trees that are planted again can be of different species
2) trees can be selectively cut down
B gives option 2
1) exposure
2) same kind of trees and therefore susceptible to diseases
fix can be like
1) trees that are planted again can be of different species
2) trees can be selectively cut down
B gives option 2
