Today in our environmental science lecture, we'll discuss urban heat islands. Cities tend to be warmer than surrounding rural areas because concrete and asphalt absorb and re-radiate heat. One effective mitigation strategy is increasing green spaces, such as parks and green roofs. However, a recent study found that the cooling effect of parks depends significantly on their size and the density of trees. Small parks with scattered trees provide limited relief, while large, densely wooded parks can lower local temperatures by up to 5 degrees Celsius. Additionally, reflective materials on buildings and pavements can reduce heat absorption, but they are less effective than vegetation in promoting evaporation.
❓ Según la conferencia, ¿qué reveló el estudio reciente sobre los parques y su efecto de enfriamiento?
A. A. Todos los parques, independientemente de su tamaño, reducen las temperaturas por igual.
B. B. Los parques grandes con árboles densos son los más eficaces para refrescar.
C. C. Los materiales reflectantes son más efectivos que la vegetación.
D. D. Los parques pequeños con árboles dispersos reducen las temperaturas en 5 grados.
✅ 正确答案
B. Large parks with dense trees are most effective at cooling.