Singapore's tagline is the cleanest and greenest place in Asia and I have to agree. Their laws on littering and cleanliness are so strict that even chewing a gum can get you arrested. The government is conscious of the environmental concerns that even smoking a cigarette is illegal. What's good in Singapore is that the citizens believe in the country's leader that they obey the laws. I just wonder if their air pollution is not getting worse because of the growing population that needs mobility via vehicles.