Scope 3 emissions from business travel includes emissions from transportation of employees for business-related activities in vehicles not owned by Stanford, such as for faculty flying to academic conferences. Stanford has also expanded this definition to include all university-sponsored travel for students and visitors, an exception within higher education that does not typically apply in other industries.
Procurement data is used to generate reports with destination and arrival airports for each trip, which is used to determine flight mileage. Distance-specific EPA emission factors and a radiative forcing factor are applied to each flight.
Procurement data on hotel nights is used to calculate emissions using DEFRA emissions factors.
a complex system using procurement data was developed to estimate emissions from ground transportation, but ground transportation ultimately resulted in only 0.4% of emissions. Thus, it will not be recalculated on an annual basis.
Read more information on how to travel sustainably.