CO and NOx are a larger immediate health issue (see: EU cities struggling with widespread adoption of dirtier diesel cars) but a lesser issue in the long term t

CO and NOx are a larger immediate health issue (see: EU cities struggling with widespread adoption of dirtier diesel cars) but a lesser issue in the long term than greenhouse gas (CO2) induced warming. I bring this up because it's a fascinating trade-off when it comes to diesels, where increased NOx emission can reduce CO2 emission substantially (through improved combustion temperatures leading to lower fuel burn) - the exact tradeoff VW were illegally making in their "cheating" diesel cars.