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NO x gases are usually produced from the reaction between nitrogen and oxygen during combustion of fuels, such as hydrocarbons, in air; especially at high temperatures, such as in car engines. [1] [2] [3] In areas of high motor vehicle traffic, such as in large cities, the nitrogen oxides emitted can be a significant source of air pollution.
The emissions specifically include SOx, NOx, ODSs and VOCs [2] and the regulations came into effect in May 2005. [3] [4] Annex VI contains provisions for two sets of emission and fuel quality requirements regarding SOx and PM, or NOx, a global requirement and more stringent controls in special emission control areas (ECA). [5]
The term NO x represents several forms of nitrogen oxides such as NO (nitric oxide), NO 2 (nitrogen dioxide) and N 2 O (nitrous oxide, also known as laughing gas).In a gasoline engine, NO is the most common form of NO x at around 93%, while NO 2 is around 5% and the rest is N 2 O.
Office Open XML (OOXML) format was introduced with Microsoft Office 2007 and became the default format of Microsoft Word ever since. Pertaining file extensions include:.docx – Word document.docm – Word macro-enabled document; same as docx, but may contain macros and scripts.dotx – Word template
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The two teams were tied 21–21 at halftime before Louisville scored the next two touchdowns. The Cardinals took a 35–21 lead with two minutes remaining in the third quarter on a 54-yard run ...
As the article says, NOx refers to NO and NO2 -- notice this doesn't include N2O. This definition follows the scientific and engineering literature which distinguishes between NOx and N2O, e.g., this article amongst many. So it's consistent to say that NO and NO2 (i.e., NOx) have a cooling effect while N2O (i.e., not-NOx) has a warming effect.