This has nothing to do with how green WMF operations might be. It has
to do with the greener choices /we/ as volunteers can make for /our/
conferences.
Since a fortnight ago you were haranguing* the WMF for using too much air
travel and lacking "any actual measurable commitment to picking up a
telephone, holding a video conference, or holding a VR conference session",
it will be interesting to see what solutions you can come up with for this
conference you're organising. Did you consider the options other than an
in-person conference that you recommended the WMF adopt, out of interest?
*
https://en.wikipedia.org/wiki/Wikipedia_talk:Wikipedia_Signpost/2019-09-30/…