Today, in our environmental science lecture, we will discuss the impact of urban heat islands. A recent study in Melbourne found that planting more trees in city centers can reduce surface temperatures by up to 4 degrees Celsius during summer afternoons. However, the effect is less significant at night, when heat stored in buildings and roads is slowly released. The study also highlighted that green roofs, though more expensive to install, provide better insulation in winter than street trees. Interestingly, the researchers noted that light-colored pavements reflect more sunlight than dark ones, but they do not cool the air as effectively as trees do.
❓ Según la conferencia, ¿qué descubrió el estudio en Melbourne sobre los árboles de las calles?
A. Reducen las temperaturas superficiales hasta en 4 grados Celsius durante las tardes de verano.
B. B) Son más efectivos para enfriar el aire durante la noche que durante el día.
C. C) Proporcionan mejor aislamiento invernal que los techos verdes.
D. D) Reflejan más luz solar que los pavimentos de color claro.
✅ 正确答案
A) They reduce surface temperatures by up to 4 degrees Celsius during summer afternoons.