Snapshot includes emissions from passenger travel on the main commercial air carriers for all states. Passenger activity data at the major airport level is sourced from Bureau of Infrastructure, Transport and Regional Economics (BITRE). Data for regional airports has been included for NSW only where available through Transport Services NSW. Emissions from regional airports within other states have not yet been included. The Snapshot team will continue to work towards sourcing complete and reliable data sets from regional airports across Australia as part of the ongoing development of the tool. For more information on aviation please see the Methodology document which can be downloaded from the Resources page.