The European Commission has proposed 30 billion euros and EU leaders, ending a two-day summit in Brussels, have been working on that basis, officials said.

However no figure was included in draft conclusions drawn up for the summit, with the EU not keen to show its hand before the US, China and others had indicated their proposals. Pressure is mounting ahead of global climate change talks to be held in Copenhagen in December.

'It would be inopportune for the European Union to be too precise on their funding objectives now, while the negotiations are going on,' one diplomat said.

That position was expressed by several of the leaders behind closed doors, according to sources.

There was also no agreement at the summit on how to divide the costs, Polish Prime Minister Donald Tusk admitted after a debate with his European counterparts on Thursday.

Poland would seek a unanimous EU decision at the next summit of the 27 nations in June, Tusk added Friday.

A draft prepared by ambassadors for EU leaders stress that 'the European Union remains committed to playing a leading role in bringing about a global and comprehensive climate agreement in Copenhagen in December 2009'.

EU Commission President Jose Manuel Barroso said the European Union should make no commitments 'while other nations, notably the United States and China,' are not doing the same.

The tactic was slammed by environmental groups. -- AFP