Abstract: Nitrogen oxide is one of the main pollutant.In nature lightning is a sparkdischarge.Atmosphere molecules react with each other during lightning.Reaction ofnitrogen oxides with other atoms and molecules is one of many reactions.We studiedspark discharging reaction of nitrogen oxide using high sensitivity laser magneticresonance method in laboratory.NO₂ was dissociated to NO after spark discharging.When NO₂ reacted with NH₃,NO₂ was reacted thoroughly after spark discharging.When NO₂ reacted with H₂O,98% of NO₂ was changed after spark discharging.While NO reacted With NH₃,90% of NO was changed after spark discharging.When NO reacted with H₂O,80% of NO was changed after spark discharging. These data are useful for dealing with atmosphere pollution.

Key words: Nitrogen oxide, LMR, Spark discharge