Forget all the media led hype about how guilty we should all feel for flying. I read somewhere that one person flying to an environmental conference produced more harmful emissions than 1500 Ford Fiestas driving all the way round the world. Having just been to the States and seen how they all act with their ignorance on waste, emissions and similar issues, I am, by comparison, very very green. Yes, lots of people doing something can make a difference, but our country all acting together without the USA and China doing the same is going to make no difference at all. We could all decide to stop flying tomorrow, create tons of employment for our airport staff and airline crews and create all sorts of economic difficulties for ourselves. For what? How many military planes are up there all the time that we don't know about? Thousands. I just do what I am comfortable with and feel no guiilt. Remember, the Romans were growing grapes in Denmark to make wine 2000 years ago.