Today in our environmental science lecture, we're discussing urban green spaces. A recent study in Melbourne found that parks can reduce local temperatures by up to 4 degrees Celsius during heatwaves. However, the cooling effect depends on tree canopy coverage. Areas with less than 30% canopy showed minimal temperature differences. Interestingly, the study also noted that residents living within 500 meters of a large park reported better mental health, but only if the park had maintained walking paths. Without these paths, usage dropped significantly, especially among elderly people.
❓ 강의에 따르면, 공원이 상당한 냉각 효과를 가지기 위해 필요한 조건은 무엇인가?
A. A. 공원은 직경이 500미터보다 커야 한다.
B. B. 공원은 최소 30%의 수목 캐노피 피복률을 유지해야 한다.
C. C. 공원에는 유지 관리되는 산책로가 포함되어야 한다.
D. D. 공원은 반드시 주거 지역에 위치해야 한다.
✅ 正确答案
B. The park must have at least 30% tree canopy coverage.