Today in our environmental science lecture, we'll discuss urban green spaces. Recent studies show that parks in cities can reduce local temperatures by up to 3 degrees Celsius during summer. This cooling effect comes from shade and water evaporation from trees. However, the size and distribution of parks matter. Small, scattered gardens have less impact than large connected areas. For example, a single large park of 10 hectares can cool surrounding streets for hundreds of meters, while many tiny plots only affect their immediate vicinity. Therefore, city planners should prioritize creating a few big parks over many small ones.
❓ 讲座对城市公园提出了什么看法？
A. A. 小型公园在降温方面比大型公园更有效。
B. B. 大型连片公园对周边区域的降温效果更为显著。
C. C. 冷却效应与公园面积无关。
D. D. 水分蒸发是温度降低的唯一因素。
✅ 正确答案
B. Large connected parks have a greater cooling effect on nearby areas.