[morsch]

The e is short for equivalent.

https://chancerylaneproject.org/glossary/carbon-dioxide-equi...

[pmayrgundter]

thanks. Also forgot to note size difference between those airports.. DEN is #4 in the US with 38M passenger boardings/year, PDX #33 with 8M. So maybe 4x larger

https://en.wikipedia.org/wiki/List_of_the_busiest_airports_i...