To better understand our environmental impact and increase the transparency of our operations, we have voluntarily tracked and reported our greenhouse gas (GHG) emissions since 2009.
While we are proud of the fuel efficiency improvements we have made in recent years, we continue to seek opportunities to further reduce our emissions intensity. In 2019, we continued to support efforts to advance the sustainable aviation fuel industry. Red Rock Biofuels began construction of their refinery in 2018, and we have committed to purchase three million gallons of sustainable aviation fuel per year from them when it becomes available.
The commitment to purchase lower carbon renewable fuel is just one way we are striving to reduce our emissions intensity.
See Footnotes: 9090) A revenue passenger mile (RPM) is one paying Passenger flown one mile. Also referred to as “traffic,” which is a measure of demand for a given period., 9191) A revenue ton mile (RTM) is one ton of revenue traffic (passenger and cargo) transported one mile., 9292) An available seat mile (ASM) is one seat (empty or full) flown one mile. Also referred to as “capacity,” which is a measure of the space available to carry Passengers in a given period., 9393) Emissions from refrigerant losses are not included in our emissions inventory due to their de minimis impact on our overall emissions., 9494) A revenue passenger mile (RPM) is one paying Passenger flown one mile. Also referred to as “traffic,” which is a measure of demand for a given period.