The sum of all organic air pollutants. Excluding methane; they account for aldehydes, ketones, alcohols, and other pollutants that are not hydrocarbons but are precursors of ozone.
NON-METHANE ORGANIC GASES (NMOG)
Meaning of NON-METHANE ORGANIC GASES (NMOG) in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012