PrepTest 158, Section 1, Question 5
A major problem facing industrial societies is their(443 more words not shown)
Based on the passage, which(15 more words not shown)
- AIt serves as(11 more words not shown)
- BIt makes aboveground(4 more words not shown)
- CIt contains hazardous(5 more words not shown)
- DIt creates underground(11 more words not shown)
- EIt recycles certain(2 more words not shown)
Reading the passage
Why would industry choose this method? To save time and money. That's the motive we noticed during the read-through.
What we’re looking for
But the method also has a more immediate purpose: put hazardous waste into underground saltwater-bearing rock so it is contained there. The choices may describe what the process is meant to accomplish rather than why industry prefers it to an alternative.
Working the answers
- A
We aren't told that this is temporary storage while the waste is made harmless. The description is of disposal, not a holding stage in a neutralization process.
- B
Being cheaper in some circumstances doesn't make other disposal methods obsolete. In fact, the author says an alternative becomes more cost-effective when injection would require going beyond 1,800 meters.
- CCorrect
This describes the method's intended job: containing waste in underground areas already saturated with salt water. It doesn't repeat our initial cost prediction, but it accurately states what injection is for. The later problems explain how that intended containment can fail.
- D
Easy, continuous, reliable monitoring isn't part of the described purpose. The accident example instead warns that underground contamination may continue for a long time before anyone discovers it.
- E
Injecting waste into the ground isn't described as recycling it, and the process isn't limited here to low-toxicity waste. E substitutes a different activity for the disposal method we read about.
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