CoolP wrote on Nov 16^th, 2011 at 3:10pm:

boeing247 wrote on Nov 15th, 2011 at 11:58pm: people became more aware of harming the environment. Is there any reference that backs up this newly discovered 'awareness' you mention there?  :-? I mean, I would be happy to see people or even companies acting aware in regard to the environment, but it could well be that you are following a naive assessment of the situation. Mark names it. That's the 'awareness' which really is present. The costs involved.

I in no way said that carbon emissions were the main cause of the Concorde's removal from service. However, most things I have read on the Concorde do mention environmental concerns as a reason that SST's are not practical and why the Concorde is no longer in service. There are a lot of climate change and environmental rallies today, so you can imagine the kinds of protests the Concorde could stir up.

And Mark should know that, the Prime Minister of Australia passed a carbon emissions bill a few months ago!  ;D