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%.
❓ 根据讲座，墨尔本的研究对树冠覆盖率得出了什么结论？
A. A. Он наиболее эффективно снижает температуру в плотно застроенных центрах городов.
B. B. Оно оказывает наибольший охлаждающий эффект в районах малоэтажной жилой застройки.
C. C. Для эффективности требуется высокий уровень обслуживания.
D. D. Он работает только с неместными видами деревьев.
✅ 正确答案
B. It has the greatest cooling effect in low-rise residential areas.