Today, in our environmental science lecture, we're discussing the impact of urban farming. A recent study in Chicago found that community gardens can reduce local temperatures by up to 2 degrees Celsius during summer heatwaves. This is because plants release moisture, which cools the air. However, the study also noted that the cooling effect is limited to a radius of about 50 meters from the garden. So, while city planners are keen on promoting rooftop gardens, they must consider the spatial distribution to maximize benefits. Interestingly, the study showed that gardens with a mix of trees and vegetables had a greater cooling impact than those with only vegetables.
❓ 根据讲座内容，芝加哥的研究发现了关于社区花园的什么？
A. 它们能使所有区域的温度降低至少3摄氏度。
B. 它们的冷却效应仅延伸至花园周围约50米的范围。
C. 它们在冬季比夏季更为有效。
D. 只种蔬菜的园子比混合种植的园子降温效果更好。
✅ 正确答案
Their cooling effect extends only about 50 meters from the garden.