Today, in our environmental science lecture, we'll discuss urban heat islands. As you know, cities tend to be warmer than surrounding rural areas due to concrete and asphalt absorbing heat. However, one effective mitigation strategy is increasing green spaces, such as parks and green roofs. A recent study in Melbourne found that adding tree canopy can reduce surface temperatures by up to 8 degrees Celsius. But, interestingly, the study also noted that the cooling effect is strongest within 100 meters of the green area. Therefore, planners should distribute small parks throughout neighborhoods rather than concentrating them in one large central park.
❓ According to the lecture, what did the study in Melbourne find about the cooling effect of green spaces?
A. A. Tree canopy can reduce air temperature by 8 degrees Celsius everywhere.
B. B. The cooling effect is most significant within 100 meters of the green area.
C. C. Large central parks are more effective than small distributed parks.
D. D. Green roofs are more effective than tree canopies in reducing heat.
✅ 正确答案
B. The cooling effect is most significant within 100 meters of the green area.