13. Biogas will be being used for cooking and heating at this time next month
14. Fossil fuels won't be turned for energy in the future
15. Tokyo has fewer billionaires than NY
16. Did a group of foreigners visit the slums last week?
17. The countryside suffers less pollution than the city
18. Overpopulation causes a lot of social problems in this area, doesn't it?
19. Shanghai has more skycrapers than Jakarta
20. How/What about going to the school cafeteria?
