Today we're discussing the impact of urban green spaces. A recent study in Melbourne found that parks can reduce local temperatures by up to four degrees Celsius during heatwaves. Interestingly, the effect is strongest when parks are larger than two hectares and include a mix of trees and open grass. The study also noted that residents living within 500 meters of a green space reported better sleep quality, possibly due to cooler nights. However, the researchers warned that simply planting more trees in streets may not have the same cooling benefit, as pavement retains heat. They recommend prioritizing large, connected green areas in city planning.
❓ 강의에 따르면, 도시 공원이 가장 강한 냉각 효과를 가지기 위해 필요한 조건은 무엇인가?
A. 그들은 주거 지역에서 500미터 이내에 위치해야 합니다.
B. 그들은 2헥타르보다 커야 하며 혼합된 식생을 가져야 한다.
C. 그들은 큰 호수나 수경 시설을 포함해야 한다.
D. 그들은 가로수를 선형으로 심어야 한다.
✅ 正确答案
They should be larger than two hectares and have mixed vegetation.