1.What does Stephen Chu suggest?
2. Why were the roofs painted white?
3. What is the problem of white roofs?
4. What do pessimists think about painting roofs?
5. Why do we need white sidewalks and roads?
6. The consequences of which are becoming more and more noticeable?
7. What gases do not allow solar heat to leave the Earth?
8. How to reduce the impact of climate?
9. What do scientists think about this?
10. What idea was approved by the environmental committee?
11. In the opinion of pessimists, the painting of the roofs is a small or a big step towards yuzhny?
12. What should we remember about global warming?