Today Singapore has one of the best air quality in south-east Asia, comparable with Europe and United States. Considering the urbanization that Singapore has gone through over the years, it is admirable that Singapore enjoys one of the best air quality in the world. Singapore has high humidity, higher temperatures almost all year long, and monsoon weather. Haze is one of the dominant problems in Singapore; however vehicular emissions are not the reason behind haze, so we will keep haze out of discussion for this blog. Today we will mainly discuss vehicular air pollution in Singapore and control technologies implemented to deal with this problem.Singaporean leadership always aimed for urban development; however the environmental impacts of the urban developments were never neglected. This could be understood from the message that the first prime minister of Singapore gave after independence, and also the actions taken by Singapore government after that. The timeline of the actions taken by Singapore government targeting environment protection policies can be seen at the following link.