Today in our environmental science lecture, we're discussing urban green spaces. A recent study in Melbourne found that increasing tree canopy cover by 20% could reduce summer street temperatures by up to 4 degrees Celsius. However, the researchers noted that this effect is strongest in residential areas with low-rise buildings, not in high-density city centers. They also emphasized that maintenance costs are often underestimated, and recommended using native species which require less water. Interestingly, community involvement in planting programs was shown to increase the survival rate of young trees by nearly 30%.
❓ 강의에 따르면, 멜버른에서의 연구는 나무 캐노피 덮개에 대해 무엇을 결론지었나요?
A. A. 밀집된 도심 지역에서 기온을 가장 효과적으로 낮춥니다.
B. B. 저층 주거 지역에서 가장 큰 냉각 효과를 나타낸다.
C. C. 효과적이기 위해서는 높은 유지 관리가 필요하다.
D. D. 그것은 비자생 수종에서만 작동한다.
✅ 正确答案
B. It has the greatest cooling effect in low-rise residential areas.