But anyway, there is reason for this misunderstanding, I see, because there sometimes is a broader and sometimes a narrower use of the symbol.
Nitrogen oxide - Wikipedia, the free encyclopedia
NOx is a generic term for mono-nitrogen oxides (NO and NO2). These oxides are produced during combustion, especially combustion at high temperatures.
NOx causes a wide variety of health and environmental impacts because of various compounds and derivatives in the family of nitrogen oxides, including nitrogen dioxide, nitric acid, nitrous oxide, nitrates, and nitric oxide.
As to derivation of N2O, the Wikipedia also says "The livestock sector (primarily cows, chickens, and pigs) produces 65% of human-related nitrous oxide. [1] Industrial sources make up only about 20% of all anthropogenic sources, and include the production of nylon and nitric acid, and the burning of fossil fuel in internal combustion engines." So - I defer to your point as to its sources, but please note that they include internal combustion engines.
Beyond that, I suggest that NO2 and atmospheric Nitric Acid are also GHG, which have not been adequately studied - not to mention SO2 and atmospheric Sulfuric Acid. And this might be worthwhile, given the increase in coal-fired electrical generation facilities. Again, maybe my science is too old, but I remember that the greenhouse effect was originally conceptualized on the basis of study of Venus' atmosphere. paul spencer
