"There are many kinds of truth. Al Gore was poleaxed by an inconvenient one yesterday.
"The former US Vice-President, who became an unlikely figurehead for the green movement after narrating the Oscar-winning documentary An Inconvenient Truth, became entangled in a new climate change spin row.
"Mr Gore, speaking at the Copenhagen climate change summit, stated the latest research showed that the Arctic could be completely ice-free in five years.
"In his speech, Mr Gore told the conference: These figures are fresh. Some of the models suggest to Dr [Wieslav] Maslowski that there is a 75 per cent chance that the entire north polar ice cap, during the summer months, could be completely ice-free within five to seven years."