Today in our environmental science lecture, we're discussing urban green spaces. A recent study in Melbourne found that adding more trees and parks to city centers can reduce local temperatures by up to 4 degrees Celsius during summer heatwaves. Interestingly, the effect was strongest in areas with tall buildings, because trees provided shade and released moisture through transpiration. The study also noted that residents living within 500 meters of a green space reported better mental health, but the temperature benefit was only observed when green spaces covered at least 30% of the neighborhood. So, it's not just about having a few plants; the density matters.
❓ 강의에 따르면, 녹지 공간이 지역 기온을 낮추기 위해 필요한 조건은 무엇인가요?
A. A. 그들은 높은 건물 근처에 위치해야 한다.
B. B. 그들은 이웃 지역의 최소 30%를 덮어야 한다.
C. C. 그들은 나무와 공원을 모두 포함해야 한다.
D. D. 그들은 주거 지역에서 500미터 이내에 있어야 한다.
✅ 正确答案
B. They should cover at least 30% of the neighborhood.