Information and IdeasHardMain idea about an unintended benefit
Information and Ideas practice question
The town planted plane trees along its main road in 1890 purely for shade. A century later, air-quality sensors found that the road, despite heavy traffic, had lower levels of fine particles than any other street in the town — the leaves, it turned out, trap the dust. The Victorians had solved a problem they did not know existed.
Which choice best states the main idea of the text?
- A. Trees planted for shade turned out, a century later, to be cleaning the air as well.Correct
- B. The town's main road has the worst air in the town.
- C. The Victorians planted the trees to trap dust.
- D. The trees were removed in 1990.
Answer: A. Trees planted for shade turned out, a century later, to be cleaning the air as well.
Planted for shade; found to trap particles; a problem solved unknowingly.
Why the other answers are wrong
- B. The town's main road has the worst air in the town.
- The road had the lowest levels.
- C. The Victorians planted the trees to trap dust.
- They planted 'purely for shade'.
- D. The trees were removed in 1990.
- The trees are still there.
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