Today in our environmental science lecture, we're discussing urban green spaces. Professor Thompson highlighted a recent study from Melbourne that examined the effects of city parks on local temperatures. The study found that areas with more than 30% tree coverage were, on average, 2.5 degrees Celsius cooler during summer afternoons compared to nearby streets without trees. Interestingly, the cooling effect was strongest within 50 meters of the park boundary. However, the professor warned that simply planting more trees isn't enough; the species and their canopy density also play a crucial role. She recommended focusing on native species that require less water and provide better shade.
❓ Según la conferencia, ¿qué reveló el estudio en Melbourne sobre los parques urbanos?
A. A. Son más efectivos para enfriar áreas dentro de los 50 metros del parque.
B. B. Solo reducen las temperaturas cuando la cobertura arbórea supera el 50%.
C. C. No tienen un impacto significativo en las temperaturas de las calles cercanas.
D. D. Requieren especies no nativas para lograr un mejor enfriamiento.
✅ 正确答案
A. They are most effective at cooling areas within 50 meters of the park.