Related topics: air pollution

Separating natural and anthropogenic pollutants in the air

COVID-19 has changed the world in unimaginable ways. Some have even been positive, with new vaccines developed in record time. Even the extraordinary lockdowns, which have had severe effects on movement and commerce, have ...

COVID-19 lockdowns linked to pollution spikes in some cities

Lockdowns last year in response to COVID-19 resulted in drastic cuts to emissions, especially from vehicle tailpipes, and yet some urban areas saw a paradoxical spike in ozone air pollution. A new study led by the National ...

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Nitrogen oxide

The term nitrogen oxide typically refers to any binary compound of oxygen and nitrogen, or to a mixture of such compounds:

(Note that the last three are unstable.)

Chemical reactions that produce nitrogen oxides often produce several different compounds, the proportions of which depend on the specific reaction and conditions. For this reason, secondary[clarification needed] production of N2O is undesirable, as NO and NO2 — which are extremely toxic — are liable to be produced as well.

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