London Low Emission Zone - Feasiblility Study

http://www.epa.gov/ttn/emc/

Now the total emissions, in weight (metric tons per year) are very similar. If we take all of the NOx emissions to be NO2, and the total mass of both to be 150 metric tons per year, how does the SO2 and NOx production compare on a per mole basis?
relative number of moles-
NO2: molar [...]

I’ve got a 99.5 VW tdi with the quintessential diesel intake clogging problem. By removing the EGR, I can fix this problem, and the egr on a diesel doesn’t affect ignition timing like it would on a gasonline engine. In fact, it is reported to have more power (but less fuel economy) because [...]

Aside from Palladium and Rhodium, are there any other catalysts or enzymes (better if they were enzymes) that act on 2NO => N2 + O2 and/or 2NO2 => N2 + 2O2?
The can be made of many other metals. The question is how they work compared to the precious metal catalysts. The reference [...]

I’ve been having some issues with the emissions on my 1993 Toyota Corolla. In my county, I have to pass E-Check, and I failed it the first time. There was a giant crack in my exhaust manifold at that time, which I (and my mechanic) expected was making my O2 sensor read wrong and was [...]

I’m home schooled and I can’t find the answear to this question.
Reducing Gas Prices
We can reduce gas prices, and in many cases reduce our expenses in other areas, by reducing the demand for petroleum products. How do we reduce demand? Easy. Reduce consumption. Here are some suggestions on how to do that:
1. Make sure your [...]

same as above
NOX is produced by the high temperatures in the cylinders during combustion. to reduce NOX; engines were slightly retarded in timing as well as having some exhaust gas introduced into the intake manifold. The latter is the function of the EGR valve. All of which is now controlled by your onboard computer or [...]

I have a 1995 Acura Integra LS and it failed emissions test due to high NOx emissions. The Limit was 1944(ppm) and it got 2668. if anyone could help with causes and fixes id appreciate it.
Is this car all stock or has it been modified at all? the cat convertor is still in place? you [...]

I have tried 3 times to pass the Emissions test for smog but the NOx levels are to high. 1275 and 959. I have changed the catalytic converter twice and the oxygen sensor once. There is no EGR valve and you can’t adjust the timing. I’ve also replaced the spark plugs. Put [...]

Part 1 of 3 segments
Stephen Scrivens, Principal of Landscape Technology lectured at the RoGBC Green Building Training in October on key gree construction issues.
His presentation deals with:
- water issues (erosion, sedimentation control, flood risk; storm water management, water borne pollution reduction)
- site location (development density, protect/restore open space, protect ecological value of site/ reduce site [...]