EU officials said president Bush's climate-change meeting next month in Hawaii was "meaningless" if Bali did not produce an "ambitious roadmap".
Stavros Dimas, the European commissioner for the environment, insisted a cut of 25% to 40% in emissions by 2020 for developed countries was a necessary part of any agreement reached at the end of the conference on Friday.
But the US, the only major industrial country to have rejected the Kyoto protocol, wants these figures removed from the document.
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