From UPSC perspective, the following things are important :
Prelims level : BS norms
Mains level : BS norms
The Ministry of Road Transport and Highways (MoRTH) has issued an order mandating a coloured strip to identify four-wheeled BSVI vehicle.
Note important PM levels allowed under BS VI norms. Note how it is different from the earlier BS IV norm.
Details of the colour band
- MoRTH has mandated a strip of green colour of 1 cm width on top of the existing sticker carrying details of registration for BS-VI.
- Vehicles of any fuel type will carry the green strip irrespective of their original stickers i.e. for petrol or CNG which have a light blue colour sticker and a diesel vehicle which is of orange colour.
- These stickers will now have a green strip of 1 cm on top for BS-VI, as mandated.
Back2Basics: Bharat Stage Norms
|Standard||Reference||Date of Implementation|
|Bharat Stage II||Euro 2||1 April 2005|
|Bharat Stage III||Euro 3||1 April 2010|
|Bharat Stage IV||Euro 4||1 April 2017|
|Bharat Stage VI||Euro 6||April 2020 with a mandate (proposed)|
Minutes of BS-VI
- Carmakers would have to put three pieces of equipment — a DPF (diesel particulate filter), an SCR (selective catalytic reduction) system, and an LNT (Lean NOx trap) — to meet stringent BS-VI norms, all at the same time.
- This is vital to curb both PM (particulate matter) and NOx (nitrogen oxides) emissions as mandated under the BS-VI norms.
How is BS-VI Different from BS-IV?
- The major difference between the existing BS-IV and forthcoming BS-VI norms is the presence of sulphur in the fuel.
- While the BS-IV fuels contain 50 parts per million (ppm) sulphur, the BS-VI grade fuel only has 10 ppm sulphur content.
- Also, the harmful NOx (nitrogen oxides) from diesel cars can be brought down by nearly 70%.
- In the petrol cars, they can be reduced by 25%.
- However, when we talk about air pollution, particulate matter like PM 2.5 and PM 10 are the most harmful components and the BS-VI will bring the cancer-causing particulate matter in diesel cars by a phenomenal 80%.