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%.
❓ Según la conferencia, ¿qué concluyó el estudio en Melbourne sobre la cobertura de copas de los árboles?
A. A. Reduce las temperaturas de manera más efectiva en los centros urbanos densos.
B. B. Tiene el mayor efecto de enfriamiento en áreas residenciales de baja altura.
C. C. Requiere un alto mantenimiento para ser efectiva.
D. D. Solo funciona con especies de árboles no nativas.
✅ 正确答案
B. It has the greatest cooling effect in low-rise residential areas.