Then I thought about the sort of people that go to these things, and how long the train takes. They're oh so terribly important (sarcasm), that they simply cannot afford the time lost by traveling in anything other than a jet.
And that I think is the problem - from the Davos-attendee right down to you and I with our cars + central heating/air-con: we all want things to improve, but we also all value (consciously or otherwise) our own comfort/time/convenience more
"Well OF COURSE most people should take the train to Davos. Absolutely! Its the climate friendly choice! I had to take a jet though because I am very busy."