nitrogen oxide
Smog-forming pollutant gas
Nitrogen oxide refers to any of several compounds of nitrogen and oxygen, including nitric oxide and nitrogen dioxide.
These gases form during combustion and contribute to air pollution, smog, and acid rain.
Vehicle emissions standards often target nitrogen oxides: The new regulations reduced nitrogen oxide emissions by forty percent.
Often abbreviated NOx in technical contexts.
Sunlight-activated urban pollution
- emissionsSubstances released into air
- exhaustUse up entirely
- tailpipeVehicle's emission outlet
- dieselCompression-ignition fuel
air quality · respiratory · inhalation · haze · ozone · particulate matter · combustion · fossil fuels
Lowest atmospheric layer
- stratosphereSecond atmospheric layer up
- ozone layerAtmospheric UV filter
- photolysisMolecular breakdown via light
- UV radiationInvisible high-energy light waves
air mass · ambient · ppb · monitoring · measurement · transport · dispersion
Exothermic reaction with oxygen
- power plantFacility producing electrical energy
- emissions controlRegulating released pollutants
- catalytic converterExhaust detoxification unit
- boilerWater-heating vessel
furnace · incinerator · coal-fired · natural gas · scrubber · permit · regulation
Forceful denial word
- reactiveTending to respond
- radicalRoot-indicating symbol
- photochemicalCaused by light radiation
- dissociationMental separation from surroundings
redox · valence · chemiluminescence · kinetics · molecule · intermediate · diatomic · pungent
SO₂ gas compound
- acidificationIncrease in hydrogen ions
- pHMeasure of solution acidity
- forest declineWidespread tree death phenomenon
- aquatic ecosystemsWater-based biological communities
fish kill · leaching · liming · plant damage · statues · corrosion · watershed · ecosystem damage
Heat-trapping atmospheric compound
- global warmingRising planetary temperatures
- climate changePlanetary atmospheric transformation
- carbon dioxideRespiration byproduct, photosynthesis fuel
- methaneSimplest alkane fuel
smog
Sunlight-activated urban pollution
diesel · air quality · respiratory · inhalation · haze · ozone · particulate matter · combustion · fossil fuels · environmental health
troposphere
Lowest atmospheric layer
- stratosphereSecond atmospheric layer up
- ozone layerAtmospheric UV filter
- photolysisMolecular breakdown via light
UV radiation · air mass · ambient · ppb · monitoring · measurement · transport · dispersion
combustion
Exothermic reaction with oxygen
- power plantFacility producing electrical energy
- emissions controlRegulating released pollutants
- catalytic converterExhaust detoxification unit
boiler · furnace · incinerator · coal-fired · natural gas · scrubber · permit · regulation
NO
Forceful denial word
- reactiveTending to respond
- radicalRoot-indicating symbol
- photochemicalCaused by light radiation
dissociation · redox · valence · chemiluminescence · kinetics · molecule · intermediate · diatomic · pungent
sulfur dioxide
SO₂ gas compound
- acidificationIncrease in hydrogen ions
- pHMeasure of solution acidity
- forest declineWidespread tree death phenomenon
aquatic ecosystems · fish kill · leaching · liming · plant damage · statues · corrosion · watershed · ecosystem damage
greenhouse gas
Heat-trapping atmospheric compound
- global warmingRising planetary temperatures
- climate changePlanetary atmospheric transformation
- carbon dioxideRespiration byproduct, photosynthesis fuel
methane · Kyoto Protocol · Paris Agreement · greenhouse effect
nitrogen oxidecarbon monoxide
Toxic combustion byproduct gas
carbon dioxide · sulfur dioxide · hydrogen sulfide · methane · oxygen
nitrogen oxideclean air
Uncontaminated breathable gas
oxygen · fresh air · pure air · breathable air · pure oxygen
nitrogen, oxide, nitro, nitrogenous, nitrate, nitrite, nitric, oxidize, oxidation