Editing Nitrogen Oxides Emissions (Anthropogenic) (section)

== Boundary Conditions ==
Boundary inclusions for this signal encompass all anthropogenic sources of nitrogen oxides emissions, including fossil fuel combustion in transportation, power generation, manufacturing, residential heating, and agricultural practices such as biomass burning and fertilizer application. Exclusions include natural sources of nitrogen oxides such as soil microbial activity, lightning, and wildfires unrelated to human activity. Emissions from international shipping and aviation are included when accounted for in national inventories but may vary based on reporting conventions. The signal focuses on direct emissions to the atmosphere and does not include secondary formation processes occurring post-emission.