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.
❓ その講義は都市公園について何を示唆していますか？
A. A. 小さな公園は、大きな公園よりも冷却効果において効果的である。
B. B. 大規模な接続された公園は、周辺地域に対してより大きな冷却効果を持つ。
C. C. 冷却効果は公園の規模とは無関係である。
D. D. 水の蒸発が温度低下の唯一の要因である。
✅ 正确答案
B. Large connected parks have a greater cooling effect on nearby areas.