Easyjet and other airlines do (optionally, some not so) offset your carbon emissions....yeah it's probably a drop in the ocean...but the guy who runs Ryanair basically said rather rudely it's all a bunch of hogwash, and he didn't care about climate change.

Nice...he might be right; but planting extra trees didn't hurt anybody. :-/

Taking the train? Makes me laugh. Eurostar is only slightly cheaper if I leave at 4am and leave early on Sunday coming back - 8am? Otherwise it's actually more expensive than a regular (ie. not bmi/easyjet if they flew there/ryanair etc) scheduled flight (BA etc) the rest of the time. One way. I mean for the price of a single one way journey I can get a return on BA or bmi (with change to spare).

And it takes longer.

Believe me I'd prefer the train, but Eurostar's half to two-thirds empty trains and high prices don't really make me want to use them. Ironically for a green service the trains are mostly empty...

So I want to be green, and would be if the difference was 10-20 quid and I didn't have to take (dodgy, and freezing cold) nightbuses in the very early morning. But when the difference for a more reasonable time is over double (£250-300 quid vs £125-150), I start to waver.