Last Updated: 7:52AM BST 10/07/2008
George Bush surprised world leaders with a joke about his poor record on the environment as he left the G8 summit in Japan.
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The American leader, who has been condemned throughout his presidency for failing to tackle climate change, ended a private meeting with the words: "Goodbye from the world's biggest polluter."
He then punched the air while grinning widely, as the rest of those present including Gordon Brown and Nicolas Sarkozy looked on in shock.
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