Former US Vice President Al Gore has denounced his own country as the roadblock to any agreement at the Bali climate change talks.
But Mr Gore says the Bush Administration will be gone in a year and he says Australia shows how a change of government can radically change a country's climate change policies.
Mr Gore has told delegates the Bush Administration must not be allowed to stand in the way of global action on climate change.
“I am going to speak an inconvenient truth, my own country the United States is principally responsible for obstructing progress here in Bali.”