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Can someone tell me, definitively, why we are trying to reduce NOx?

Yes, it comes out of tailpipes, and the stuff that comes out of tailpipes has always been deadly.

Yes, in high concentrations, it probably plays a part in LA's smogscape of the late 1900's.

Yes, my first car which made excessive NOx had a distinct smell and made me feel happy...

But did you know that NOx uses sunlight to produce free oxygen in a catalytic cycle? This free oxygen then reacts to produce ozone. Aren't we kind of having an ozone shortage right now?



Ozone near the earth's surface (which this road surface attacks) is a health risk, and contributes to smog. Ozone higher up in the atmosphere (of the famous "hole") blocks UV radiation.

http://www.policyalmanac.org/environment/archive/ozone.shtml




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