❓ Câu hỏi According to the passage, what is a primary reason why urban heat islands are often stronger at night?
- A. A) Urban areas emit more solar radiation during the day.
- B. B) Heat-absorbing materials release stored heat slowly after sunset.
- C. C) Vegetation increases evapotranspiration at night.
- D. D) Waste heat from vehicles peaks during nighttime hours.