Today in our environmental science lecture, we'll discuss the impact of urban green spaces on air quality. A recent study in Melbourne monitored two parks over a year. The researchers found that trees, especially broad-leaved species like oaks, reduced particulate matter by up to 30% near busy roads. However, the effect was only significant within 50 meters of the green area. Interestingly, the study also noted that grass areas had a minimal effect compared to tree canopies. The lead researcher, Dr. Emily Watson, suggests that city planners should prioritize planting clusters of trees rather than isolated ones to maximize air purification benefits.
❓ 강의에 따르면, 멜버른에서의 연구는 도시 녹지 공간의 효과에 대해 무엇을 밝혀냈습니까?
A. A. 잔디 지역은 오염을 줄이는 데 있어 나무보다 더 효과적이었다.
B. B. 나무는 번잡한 도로로부터 50미터 이내에서 미세먼지를 30% 감소시켰다.
C. C. 대기 질에 미치는 영향은 녹지로부터 50미터 이상 떨어진 곳에서 가장 강하게 나타났다.
D. D. 고립된 나무들이 나무 무리보다 더 유익했다.
✅ 正确答案
B. Trees reduced particulate matter by 30% within 50 meters of busy roads.