In yet another push for cleaner vehicles here, no more new diesel cars and taxis will be allowed to be registered here from 2025.
Transport Minister Ong Ye Kung announced this at a debate on the Government's sustainability plans yesterday.
He noted that motor vehicles in Singapore emit about 6.4 million tonnes of carbon dioxide equivalent per year.
A carbon dioxide equivalent is used as a measure to compare the emissions from various greenhouse gases based on their global warming potential - or the potency of a greenhouse gas in absorbing and trapping heat.
If light vehicles - including cars and taxis - all ran on electricity, "the total net carbon abatement would be about 1.5 million to 2 million tonnes per year".
"This abatement is about 4 per cent of our total national emissions - not insignificant," Mr Ong added, noting that there is 50 per cent carbon savings by switching to electric vehicles "even if the electricity is generated by fossil fuels".
He said banning the registration of new diesel cars and taxis would "further pave the way for greener vehicles", as diesel models are more pollutive.
In Singapore, diesel vehicles are mostly goods vehicles and buses. Among passenger cars, diesel models make up merely 2.9 per cent of last year's population of 634,042.
Taxis used to be largely diesel, but more than half have switched to petrol-electric hybrid models. As at the end of last year, only 41.5 per cent of the 15,678 cabs here were diesel-powered. In contrast, 95.8 per cent of the 140,783 goods vehicles and 99.4 per cent of the 18,912 buses run on diesel.
The new Commercial Vehicle Emissions Scheme, which kicks in next month, is designed in part to persuade owners of light commercial vehicles - which make up 68.9 per cent of all goods vehicles - to switch to cleaner fuels.