Today in our environmental science lecture, we're discussing urban green spaces. A recent study in Melbourne found that adding more parks and trees in city centers can reduce local temperatures by up to 3 degrees Celsius during summer heatwaves. This cooling effect is mainly due to shade and evapotranspiration. Interestingly, the study also noted that while green roofs are effective for insulation, they have less impact on street-level temperature compared to street trees. The researchers recommend prioritizing tree planting along busy roads and near residential buildings, as these areas benefit most from reduced heat exposure. However, they warned that water availability is a key constraint in drier climates, so sustainable irrigation systems must be considered.
❓ 根据讲座内容，墨尔本的研究发现，街道树木与绿色屋顶相比有何发现？
A. A) 街道树木在降低街道层面温度方面更为有效。
B. B) 绿色屋顶不仅提供了更好的隔热效果，还能减少街道热量。
C. C) 两者在降低城市温度方面同样有效。
D. D) 绿色屋顶对住宅建筑更为有益。
✅ 正确答案
A) Street trees are more effective at lowering street-level temperatures.