EU nations have still not decided how to fill a multi-billion euro fund to help tackle climate change, just as the region's executive body hosts talks with countries likely to bear the brunt of extreme weather.
The European Union recommitted to providing EUR€7.2 billion (USD$9.4 billion) for the fund between 2010-2012, according to draft conclusions seen by reporters ahead of a meeting of EU finance ministers next week.
But after that, how much cash will flow is unclear as the text - drafted against the backdrop of acute economic crisis in the eurozone - only states the need to "scale up climate finance from 2013 to 2020" without specifying how.
The Green Climate Fund aims to channel up to USD$100 billion globally per year by 2020 to help developing countries deal with the impact of climate change.
Its design was agreed at international climate talks in Durban last year.
Europe's Climate Commissioner Connie Hedegaard is fighting to build on Durban's fragile agreement to keep alive the United Nations process on tackling climate change.
On Monday and Tuesday, she will hold informal discussions in Brussels with members of what some call the "coalition of ambition", ahead of UN talks in Bonn later this month.
The coalition is a union of the EU, the Alliance of Small Island States and the Least Developed Countries, which at the UN talks in Durban played a lead role in forging agreement on keeping alive the Kyoto process to address global warming.
"I have invited to Brussels today and tomorrow a group of 30 ambitious countries, represented by their ministers, to discuss how we can keep up this momentum and continue to achieve results together," Hedegaard said in a statement.
Non-governmental organization Oxfam said "intransigence" from some EU member states was putting the coalition at risk as they are arguing against firm commitments to finance after 2012.
"At a critical moment in the fight against climate change, Europe looks to be sitting back rather than stepping up," Lies Craeynest, Oxfam's EU climate change expert, said.
Debate has also focused on how much of the EU's USD$30 billion share of the USD$100 billion should come from the private sector, which would reduce the need for public funds.
The draft conclusions ahead of the May 15 EU ministerial meeting noted "further efforts are required to clarify the concept of private financing and its contribution to the USD$100 billion".
Some money could come from levies on shipping and aviation, although these sources are contentious.
Since January, all airlines using EU airports have been required to offset their carbon emissions using the EU's Emissions Trading Scheme (ETS), prompting an outcry from some non-EU nations.
The level of protest has intensified effort at the UN's International Civil Aviation Organization (ICAO) to come up with a global plan for tackling airline emissions. If achieved, that would justify modifying the EU scheme, the Commission has said.
Experience suggests it would be rash to hope for too much from ICAO. The European Commission said the EU was driven to bringing all airlines into its scheme because more than a decade of talks at ICAO had produced no result.
The Commission is also working with the International Maritime Organization (IMO) to find a solution for shipping emissions.
The draft conclusions called on "the EU and its member states to further engage effectively in negotiations in ICAO and IMO to support carbon pricing schemes".