Today we're discussing the impact of urban green spaces. A recent study in Melbourne found that adding trees and parks to city areas can reduce local temperatures by up to 4 degrees Celsius. However, the effect is strongest when green spaces are connected, forming corridors. Interestingly, the study also noted that residents near these spaces reported lower stress levels, but only when the spaces were well-maintained. The researchers suggest that city planners should prioritize creating linked networks of small parks rather than one large central park, as this benefits more neighborhoods.
❓ 根据讲座内容，墨尔本的研究揭示了城市绿地的哪些情况？
A. A. 它们只有在非常大时才会降低温度。
B. B. 当它们连接在一起时，冷却效果更强。
C. C. 它们对居民的压力水平没有影响。
D. D. 一个大型中央公园比多个小型相连公园更有益。
✅ 正确答案
B. Their cooling effect is stronger when they are connected.