A key component of our climate strategy is replacing older, less fuel-efficient aircraft with new, more efficient ones. Largely as a result of flying these more-efficient aircraft, we have improved our fuel efficiency by 10.4% compared with 2013, based on fuel burn per available seat mile. That adds up to 2.4 billion gallons of fuel saved and nearly 23 million metric tons of CO2 avoided from 2013 through the end of 2022.