That's NO2, nitrogen dioxide. It contributes to acid rain but not to global warming: https://www.epa.gov/no2-pollution/basic-information-about-no2#Effects https

That's NO2, nitrogen dioxide. It contributes to acid rain but not to global warming: https://www.epa.gov/no2-pollution/basic-information-about-no2#Effects https://www.epa.gov/no2-pollution/basic-information-about-no... Unless you already know this fact it's hard to search for, though. Even with an exact-quotes Google search for "nitrogen dioxide" "global warming potential", Google shows me an info snippet for N2O, nitrous oxide.