Not that Ryanair seems particularly bothered about that. Earlier in the year boss Michael O'Leary rallied against the ‘eco-loonies', claimed climate change minister Ian Pearson ‘hadn't a clue what he was talking about', and proclaimed Ryanair ‘the greenest airline in Europe'. His company also recently announced it will discount 10m tickets in the summer.
Clearly, as governments latch on to the carbon emission issue and dream up ways to curtail travel, the tourism industry - and airlines in particular - will have to go the extra mile to secure their income. Judging by the success of Ryanair's offer, however, it seems climate change isn't looming large enough yet to deter the average punter from a decent bargain.