Quote:
Originally Posted by Sven7
Are there any relatively simple mods one could do to reduce a car's CO2, NOx, etc. emissions?
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Nothing easy, I'm afraid.
Keeping the engine warm seems to be the easiest theoretic solution, though it's not exactly practical.
CO2 is not a problem as such - it's just a problem it comes from depleting , un-renewed stocks.
On a cold engine, the main issues are unburned or partially burned, unhealthy hydrocarbons.