We thank Mr Mirchandani Sanjay Lachman for his feedback and suggestion on reducing vehicular emissions ("Clamp down on harmful vehicular emissions"; Forum Online, Aug 25).

The National Environment Agency (NEA) shares the reader's concerns on the impact of vehicular emissions on the environment and has put in place various measures to mitigate this.

Under the Environmental Protection and Management (Vehicular Emissions) Regulations, it is an offence for any vehicle to emit smoke while in use on the road.

All vehicles, including goods vehicles, must undergo mandatory periodic inspections at authorised inspection centres to ensure compliance with exhaust emission standards.

In addition, NEA takes stringent enforcement action against smoky vehicles on Singapore roads.

Foreign-registered vehicles entering Singapore via the Woodlands and Tuas land entry checkpoints are screened for smoke emissions.

NEA also conducts smoke emission tests on foreign-registered vehicles that are spotted emitting smoke. The drivers will be fined if the smoke emissions of their vehicles exceed the limit of 40 Hartridge Smoke Units (HSU). Vehicles that emit excessive smoke of more than 70 HSU will be turned back to Malaysia.

Members of the public who spot smoky vehicles on the road are also encouraged to report them to NEA, providing details such as vehicle registration number, location, date and time of the incident via the following:

- NEA hotline: 1800-CALL NEA (1800-2255 632)

- Online feedback: http://www.nea.gov.sg/corporate-functions/feedback

- myENV mobile application

Fong Peng Keong

Director

Pollution Control Department

National Environment Agency