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.
❓ Согласно лекции, что обнаружило исследование в Мельбурне о снижении городской жары?
A. A. Зелёные крыши более эффективны, чем уличные деревья.
B. B. Увеличение древесного покрова на 20% может снизить температуру примерно на 4 градуса.
C. C. Бетон и асфальт помогают снизить поглощение тепла.
D. D. Жилые районы не оказывают влияния на городские острова тепла.
✅ 正确答案
B. Increasing tree canopy by 20% could lower temperatures by about 4 degrees.