Environmentalists have been making such comparisions for years, but now some within the travel industry are also suggesting that their sector could be accused of being in the same state of denial – or worse, being as willfully obstructive – as the tobacco industry was 30 years ago in facing up to its negative impacts. Here’s Mark Ellingham, founder of Rough Guides, quoted in a Guardian report today which led on how a record will be set this month for the highest number of flights worldwide – 2.5bn – a 5% rise on the same period last year.

“The tobacco industry fouled up the world while denying it as much as possible for as long as they could. If the travel industry rosily goes ahead as it is doing, ignoring the effect that carbon emissions from flying are having on climate change, we are putting ourselves in a very similar position to the tobacco industry.”