According to the passage, how do trees help to cool a neighbourhood?
Cities have long treated parks as a luxury to be added once the essential work of building is done. Recent studies suggest that this view is mistaken. Trees lower summer temperatures by shading streets and by releasing water vapour, which can make a neighbourhood several degrees cooler than a paved district nearby. Green areas also absorb rainwater and reduce the risk of flooding. Researchers who track residents' health report lower stress among people who live close to parks, although they admit that wealthier people are more likely to live near them, which makes the link hard to prove. Planners therefore face a choice. They can add small parks in many places at a modest cost, or build a few large ones that offer more variety but are far from most homes.
Answer and explanation
Correct answer: B. By shading streets and releasing water vapour
- Step 1: The passage names two effects. Step 2. They are shade and the release of water vapour. Answer: shading and releasing water vapour. Why not the others: these mechanisms are not mentioned.
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