Today, in our environmental science lecture, we'll discuss the impact of urban green spaces. A recent study in Manchester found that increasing tree coverage by 10% could reduce surface temperatures by up to 2.5 degrees Celsius during heatwaves. However, the researchers noted that the effect varies depending on tree species and local wind patterns. They also emphasized that green roofs, while beneficial for insulation, have a smaller cooling effect on street level compared to parks. Interestingly, the study suggested that small, scattered green areas are more effective for cooling than one large park, because they allow better air circulation. This finding challenges previous assumptions in urban planning.
❓ 根据讲座内容，曼彻斯特的研究揭示了城市绿色空间的哪些情况？
A. A. 大型公园比小型绿地更能有效降低城市温度。
B. B. 将树木覆盖率提高10%，可使气温降低高达2.5摄氏度。
C. C. 绿色屋顶对街道层面的降温效果最为显著。
D. D. 树木的冷却效应与当地的风向模式无关。
✅ 正确答案
B. Increasing tree coverage by 10% can lower temperatures by up to 2.5 degrees Celsius.