News for hackers. Stuff that matters.

A comment on Diesel cars produce more toxic emissions than trucks and buses, EU study says. Parent comment

Re:Diesel cars produce more toxic emissions than trucks and ... by guscost on Friday January 06, 2017 @03:15PM (#13339795)
The smoke/soot you can see is particulate matter, not NOx. That's only a problem with older diesels or if the owner removes the filter, modern diesels with intact DPFs emit way less particulate matter than an average gasoline car.

The health problem with NOx (as I understand it) is that it will react with oxygen producing ozone and therefore smog, if there is enough in the air.

[ Parent | on HN ]
Re:Diesel cars produce more toxic emissions than trucks and ... by fjrieiekd on Monday January 09, 2017 @08:31PM (#13361740)
Even new diesel trucks from Japan do this in places like the Caribbean. Maybe the standards are lower but I haven't seen a similar problem with new gas cars.
[ Parent | on HN ]
Re:Diesel cars produce more toxic emissions than trucks and ... by guscost on Friday January 20, 2017 @03:14AM (#13442369)
The US has way stricter new car auto emission standards than pretty much anywhere else, and I think lots of countries don't require DPFs at all, good point.

If the US standards get much stricter there will have to be PM filters on gasoline cars too.

[ Parent | on HN ]