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.
❓ 講義によると、メルボルンの研究では、都市の暑さを軽減することについて何が判明したのでしょうか？
A. A. 緑の屋根は街路樹よりも効果的です。
B. B. 樹冠を20%増やすことで、気温を約4度下げることができる。
C. C. コンクリートとアスファルトは熱の吸収を抑えるのに役立つ。
D. D. 住宅地域は都市のヒートアイランドに影響を与えない。
✅ 正确答案
B. Increasing tree canopy by 20% could lower temperatures by about 4 degrees.