Listen to part of a lecture in an environmental science class.
Professor: Today, let's talk about urban heat islands, a phenomenon where cities are significantly warmer than surrounding rural areas. This happens because concrete, asphalt, and buildings absorb and re-emit solar heat more than natural landscapes do. Also, waste heat from vehicles and air conditioners adds to the effect. Interestingly, the intensity of an urban heat island can vary by season and time of day. For example, it's often strongest at night, when rural areas cool down quickly but urban materials release stored heat slowly. One common solution is planting more trees, which provide shade and release moisture through transpiration. Another is using reflective or green roofs, which reduce heat absorption. However, implementing such measures requires urban planning and community support. So, it's not just an engineering challenge, but also a social one.
❓ 题目 What does the professor say about the urban heat island effect?
A. A. It is most intense during the middle of the day.
B. B. It is caused only by vehicle emissions.
C. C. It is often stronger at night due to slow heat release from urban materials.
D. D. It has no solutions that involve community involvement.
✅ 正确答案
C. It is often stronger at night due to slow heat release from urban materials.
