Is there any way to convert the vehicular emissions from cars during journey to oxygen or safer gases to eliminate/decrease vehicular pollution?

My question is keeping in mind most populated and polluted countries where majority of people can't afford for/not willing to buy H2-run cars nor get rid of existing fuel cars nor interested in using bicycles.

In simple terms: Is there a possibility for real time emission converter? Do they already exist or is there any research in this area? Any kind of help is appreciated.

Thank you

EDIT: re-posted at Sustainablity & Engineering

  • $\begingroup$ Do you mean reducing emissions of particulate matter, VOCs, and NOx? There are technologies, such aß catalysts, that reduce emissions of some air pollutants. Also the driving behaviour can lead to a reduction of emissions of some pollutants. However, reducing emissions of one pollutant might increase emissions of another pollutant. Just to Make sure: you are asking for reducing air pollutants and not for climate-change-relevant emissions, such as CO2 and Methane? $\endgroup$ – daniel.heydebreck May 1 '16 at 19:42
  • $\begingroup$ Please clarify: Do you need this information to calculate transport-sector emissions supplied into a chemistry transport model? (edit: Please clarify as soon as possible) $\endgroup$ – daniel.heydebreck May 2 '16 at 6:42
  • $\begingroup$ No @Daniel.Neumann. Just random question whose solutions I am unaware of. $\endgroup$ – proggeek May 2 '16 at 8:02
  • $\begingroup$ CTM is good idea though for real time emission convertor. $\endgroup$ – proggeek May 2 '16 at 8:07
  • $\begingroup$ Unfortunately, the question is off-topic here. Please consider asking at Mechanis.SE or at Sustainability.SE. $\endgroup$ – daniel.heydebreck May 2 '16 at 8:08