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As a former NOAA (NWS) employee, I'm glad that Mr. Karl stopped short of linking extreme severe weather events (e.g., tornado outbreaks, derechos,...
Another interesting anecdote similar to Bob's. I retired as an operational meteorologist from the National Weather Service at the beginning of...
Sure, just wanted to be clear. Since the nitrogen in NOx is in its oxidized state, the challenge to reduce the NOx to elemental nitrogen has...
Actually, scr (and also NOx storage catalysts which are used on the VW Jetta TDI) converts oxides of nitrogen (NOx = NO + NO2) into mostly...
While that may be true up to now, the latest Euro 6 diesels actually have very low emissions in the NEDC. For example, the BMW 320d EDE has lower...
EPA's Green Vehicle Guide only lists the emission standards. The actual certified emissions of each vehicle is listed at Annual Certification...
There's at least one comprehensive study which addresses carcinogenicity and other acute and chronic health effects of exhaust from new-technology...
It may be addressed in the full paper, but none of the write-ups on this study that I've seen have offered an explanation as to why cloud debris...
Yes. VOCs are the primary reason ozone (the primary constituent of "smog") accumulates in urban air.
I don't follow how you arrived at those numbers. LEVIII will actually have two "SULEV" categories - SULEV30 and SULEV20 ( Emission Standards:...
Virtually eliminating PARTICLE emissions. Even CARB acknowledges that a diesel car they tested had particle emissions that were indistinguishable...
Not according to a study just released by the Health Effects Institue (HEI)... http://pubs.healtheffects.org/getfile.php?u=708
I've seen the same. For example, Argonne National Laboratory's GREET model shows higher well-to-wheels levels of some emissions than even...
But again, that's a non-issue with the current light-duty diesel vehicles sold in the U.S. All have particle filters (DPF) as OEM equipment, which...
GC - since you live in the UK, I'm not familiar enough with your local atmospheric chemistry to offer an informed opinion. I am aware that the...
I apologize for suddenly dropping out of this discussion, but I was called out of town because of a family emergency and haven't had access to the...
I compared the emissions of the 2012 VW Passat certified as PZEV by CARB with the 2012 VW Passat TDI certified as ULEV, adding the upstream...
Also, EPA's "Green Vehicle Guide" only addresses exhaust emissions. Gasoline inherently has much higher upstream VOC emissions which IMHO need to...
But again, what about the higher HC emissions of the petrol cars? Why are you fixated on NOx emissions?
I'm not disputing that older diesel vehicles (pre-Euro 4) had relatively high PM and NOx emissions. I'm sure there are still many older diesel...
