Do Turtles Have Carbon Footprints?

It was reported on the BBC (http://news.bbc.co.uk/1/hi/wales/south_west/7533649.stm) that Newquay's Blue Reef Aquarium has been nursing Loggerhead turtles (Caretta caretta) back to health (their main problem may have been the temperature of the waters around our coasts). One ('Flash') was found at Ogmore-by-sea but two others ('James' and 'Dink') have been claimed to be 'successfully released' (they swam off and didn't come back?) in the Canary islands. It's difficult to balance the energy economics of the exercise as the release involved flying the turtles, their keepers and a BBC film crew to the Canaries and one might argue that one could do more for turtle conservation by applying the cash to in situ programmes. However, the exercise raises publicity for the species, the aquarium and 'saves' two turtles. It does, of course, generate quite a bit of carbon dioxide (and, before anyone points it out, the animals shown above are Green turtles, due to be returned by air to the Caribbean from the UK).