Hopefully this is the beginning of the end of the diesel engine - Clarkson was right all along ; it IS the fuel of the devil. In turbo diesel form it does produce astonishing levels of torque (thus good for lorries and those big red things poor people get on) but even with all the available technology and particulate filters it still emits a whole host of incredibly harmful shite. In fact, the new particulate filters may actually make things worse as the particles that do manage to get through are so microscopic that there are concerns that they will be ingested straight through the lungs into the bloodstream. At least the old "big" particulates got caught in the lungs.
A simple fact is that if all 24,000 black cabs in london were replaced with V8 petrol Range Rovers, the air quality in London would be massively improved. So there might be more CO2 - but CO2 doesn't kill people, it merely dents the Ozone layer. Which is fucked anyway thanks to the US of A and China.
R.I.P diesel. And good riddance.
