To protect the health of its citizens, Singapore may tighten its automobile emission standards to the Euro III level immediately. These tougher standards will help limit fine particulate matter.

Though a steep registration fee helped restrict the number of automobiles and motorbikes in Singapore to 708,370 last year, land transportation authority data showed that the lungs of Singapore's 4.3 million inhabitants have begun to feel the traffic's effects. According to estimates, half of Singapore's pollution comes from motor vehicle exhaust, and the emissions from diesel trucks account for almost all of the fine particles in the air coming from vehicles.