Narrator: Listen to part of a lecture in an environmental science class. Professor: Today we're going to talk about urban heat islands. As you know, cities tend to be warmer than surrounding rural areas. This is due to several factors. First, concrete and asphalt absorb and retain heat during the day, releasing it slowly at night. Second, buildings block wind, reducing natural cooling. Third, waste heat from vehicles and air conditioners adds to the warmth. But there are solutions. Planting trees and creating green roofs can provide shade and cool the air through evapotranspiration. Also, using reflective materials on roofs and pavements can reduce heat absorption. Some cities have implemented cool pavement programs, painting roads with light-colored coatings. These measures not only lower temperatures but also reduce energy consumption for cooling, which in turn cuts greenhouse gas emissions. However, effective implementation requires careful planning and community support. So, while the urban heat island effect is a serious issue, it's not insurmountable.
❓ Вопрос What is the main purpose of the lecture?
A. To explain the causes and potential solutions of the urban heat island effect
B. To compare the climate of cities and rural areas
C. To discuss the history of urban planning
D. To criticize the use of air conditioning in cities
✅ Правильный ответ
To explain the causes and potential solutions of the urban heat island effect
TOEFL Listening Tips
Skim the questions first to predict the content
Watch for signal words in lectures and conversations (however, actually, in fact)
For main idea questions, focus on the beginning; for detail questions, focus on examples and data
For attitude questions, pay attention to the speaker's tone and word choice
Take notes on keywords; don't try to write down every word
