Too much travelling.

It turns out, according to a TGI survey mentioned today in The Guardian, that the UK's emissions from air travel are higher, per capita, than those of any other country.
So who are we blaming? The proliferation of low cost airlines is shouldering a big proportion of the blame.
But what about consumers? The sad truth seems to be, once again, that we want companies to baby-sit us and make our decisions for us. Equally, however, I should imagine there'd be uproar if airlines doubled prices on environmental grounds.
Unfortunately, in the adult world, there's no-one to turn the lights on and make the monsters under the bed go away. The question for marketers is how much responsibility our clients need to take for their customers' actions.