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-emit heat. One surprising factor is that parks and green spaces can significantly reduce local temperatures, sometimes by up to 4 degrees Celsius. However, the effect is limited to a small radius around the green area. Therefore, city planners should distribute small parks throughout neighborhoods rather than relying on one large central park. Additionally, using light-colored materials for roofs and pavements can reflect more sunlight and further mitigate the heat.
❓ According to the lecture, what does the speaker suggest city planners do to reduce urban heat?
A. A. Build one large central park in the city center
B. B. Use dark-colored materials for roads and buildings
C. C. Create several small green spaces across the city
D. D. Increase the number of tall buildings for shade
✅ 正确答案
C. Create several small green spaces across the city