Good morning, everyone. Today we'll continue our discussion on environmental science, focusing on urban heat islands. As we know, cities tend to be warmer than surrounding rural areas due to concrete and asphalt absorbing heat. However, a recent study in Melbourne found that increasing tree canopy by just 20% could reduce surface temperatures by up to 4 degrees Celsius. Interestingly, the study also noted that green roofs, while beneficial, had a smaller effect than street trees, because trees provide shade and evaporative cooling. The researchers emphasized that planting trees along streets, especially in residential areas, is the most cost-effective strategy.
❓ 강의에 따르면, 멜버른에서 진행된 연구는 도시 열을 줄이는 데 대해 무엇을 발견했습니까?
A. A. 옥상 녹화는 가로수보다 더 효과적입니다.
B. B. 나무 캐노피를 20% 늘리면 기온이 약 4도 낮아질 수 있습니다.
C. C. 콘크리트와 아스팔트는 열 흡수를 줄이는 데 도움이 된다.
D. D. 주거 지역은 도시 열섬 현상에 영향을 미치지 않는다.
✅ 正确答案
B. Increasing tree canopy by 20% could lower temperatures by about 4 degrees.