Former government leaders, a Hollywood actor and an astronaut have added to the calls for President Bush to re-consider his policy on global warming.
In an open letter published in Time magazine the former American president Jimmy Carter, the former Russian leader, Mikhail Gorbachev, the actor Harrison Ford and the American space pioneer, John Glenn, joined other prominent figures in urging Mr Bush not to reject the Kyoto protocol on climate change, which is aimed at limiting the gas emissions believed to cause global warming.
They say international consensus and immediate action is needed to address the threat of climate change.
From the newsroom of the BBC World Service