Today, in our environmental science lecture, we'll discuss the impact of urban heat islands. As cities grow, concrete and asphalt absorb and re-emit heat, making urban areas significantly warmer than surrounding rural regions. One effective mitigation strategy is increasing green spaces, such as parks and green roofs. Studies show that a single tree can cool its immediate area by up to 5 degrees Celsius. However, the most cost-effective method, surprisingly, is painting rooftops white to reflect sunlight. This can reduce cooling costs by up to 20% in hot climates. So, while trees are beneficial, white roofs offer a more practical solution for large-scale application.
❓ Theo bài giảng, cách tiết kiệm chi phí nhất để giảm hiệu ứng đảo nhiệt đô thị là gì?
A. Trồng thêm nhiều cây xanh trong công viên
B. Xây dựng mái nhà xanh trên các tòa nhà cao tầng
C. Sơn mái nhà màu trắng để phản chiếu ánh nắng mặt trời