It features polar bears falling out of the sky to their deaths as a plane is heard flying overheard. The ad ends with the message: "An average European flight produces over 400kg of greenhouse gases for every passenger. That's the weight of an adult polar bear".

Lord Christopher Monckton of Brenchley, UK - a climate change skeptic – said: "Not only is this distasteful and disrespectful, it is a fraudulent piece of scaremongering. To grab headlines in this way is cheap, tasteless and childish, no doubt to get attention in time for the Copenhagen Summit".

Others said people may not get the connection between the brutal deaths of the polar bears and airline carbon emissions.