Adding nitrogen to concrete could significantly reduce global levels of potentially harmful nitrogen oxides (NOx) created by the construction industry in developing towns and cities, contributing to a reduction in NOx emissions by 3.4-6.9 megatons (Mt) — representing 6-13% of industry-related emissions in 2021. Nitrous oxide molecules stay in the atmosphere for an average of 121 years before being removed by a sink or destroyed through chemical reactions. The impact of 1 pound of N2O on warming the atmosphere is 265 times that of 1 pound of carbon dioxide.
www.epa.gov/ghgemissions/overview-greenhouse-gases#:~:text=Nitrous%20oxide%20molecules%20stay%20in,1%20pound%20of%20carbon%20dioxide.&text=Globally%2C%2040%25%20of%20total%20N,emissions%20come%20from%20human%20activities.