Can we reduce the amount carbon monoxide and nitric oxide emitted from car?

@SOUNDHER RAJAN - That looks like an interesting project to work on. Have you researched and found out ways? If not, that'd be the first step. Second step would be to discuss your observations so that we can help you. 

As far as I am aware activated charcoal does not absorb Carbon Monoxide. Lower cost catalysts using cheaper copper or palladium may work in the place of the expensive platinum catalysts.

No @Kaustubh sir keep searching only. Once I found I will inform u sir 

@Ramani Sir. Is there is any element for absorbing carbon monoxide or some others agents 

See this: http://www.graviky.com/kaalink.html

Bengaluru based startup has made a prototype to seize exhaust pollution from car and moterbikes.

1 Maybe we can use some chemicals which absorb the harmful gases .  Chemicals like zeolites , platinum which absorb black smoke which can be used in exhaust of bikes .

2 we could use pure fuels with less or  no hydrocarbon content in it.

3 Invent some methods to avoid incomplete combustion in power stroke ...... Etc

@sounder raj some copper salts can absorb CO.

https://pubs.acs.org/doi/pdf/10.1021/ie50244a023?download=true