Same factors as your annual footprint.
Pick two ways of making the same trip. Both are estimated from the same factors, as a range. The result is a number, not a verdict.
Option A
Option B
Option A
9.5 – 12 kg CO₂e
Train · per person, this trip
Global average, no Sweden factorHigh confidence±10 %Factor row ef_025
- Factor is per passenger-kilometre; typical occupancy is already inside it
Option B
52 – 63 kg CO₂e
Petrol car · per person, this trip
Global average, no Sweden factorHigh confidence±10 %Factor row ef_019
- One person in the vehicle; the factor is per vehicle-kilometre
Option A is estimated about 82 % lower than option B, given these assumptions.
Not possible right now is a valid answer. The comparison stays here when you want it.