Today in our environmental science lecture, we're discussing the impact of urban development on local wildlife. One key example is the city of Melbourne, where planners introduced green roofs on new buildings. These roofs, covered with plants, provide habitats for insects and birds. However, a study found that while green roofs increased biodiversity, they did not significantly reduce the urban heat island effect. Instead, the most effective measure was planting street trees, which lowered ground-level temperatures by up to 2 degrees Celsius. The lecturer emphasizes that future policies should prioritize street trees over green roofs for cooling, but combine both for ecological benefits.
❓ Según la conferencia, ¿cuál fue el hallazgo principal sobre los techos verdes en Melbourne?
A. A. Fueron más efectivos que los árboles de la calle para reducir el calor.
B. B. Aumentaron la biodiversidad pero tuvieron poco efecto en el calor urbano.
C. C. Redujeron las temperaturas a nivel del suelo en 2 grados Celsius.
D. D. Fueron menos beneficiosos para los insectos y las aves de lo esperado.
✅ 正确答案
B. They increased biodiversity but had little effect on urban heat.