What worries me in this argument as much as the environment (I am naturally concerned that the planet is not ruined) is the way this has become a sort of moral crusade about how people live their lives. I.e. if you take the plane rather than the train you are somehow a bed person. The other thing that gets me (and perhaps I am being ridiculous) with these conferences like Copenhagen. Is what is the environmental cost? Getting everyone there and back, politicians, journos, Police, protesters, scientists, civil servants, feeding them, etc, the list goes on and on. I can see the intended aim of the conference but does the means justify the end?