Today in our environmental science lecture, we're discussing urban green spaces. A recent study in Melbourne found that parks reduce local temperatures by up to 4 degrees Celsius during heatwaves. Interestingly, the cooling effect is strongest within 50 meters of the park boundary, and it diminishes as distance increases. The study also noted that trees with large canopies are more effective than grass areas alone, because they provide shade and release moisture through transpiration. However, researchers warned that small pocket parks, less than half a hectare, have a negligible impact on surrounding neighborhoods. So, for future city planning, larger interconnected green corridors are recommended over isolated small gardens.
❓ Según la conferencia, ¿qué descubrió el estudio de Melbourne sobre el efecto de enfriamiento de los parques?
A. A. Es más fuerte dentro de los 50 metros del límite del parque.
B. B. Funciona mejor para parques de menos de media hectárea.
C. C. Las áreas de césped son más efectivas que los árboles para reducir el calor.
D. D. El efecto dura varias horas después de la puesta del sol.
✅ 正确答案
A. It is strongest within 50 meters of the park boundary.