Brussels - Climate change, the financial crisis and the European Union's woes over the stalled Lisbon Treaty are set to top the agenda Thursday when EU leaders meet for what has been billed as the most important summit in years.
"This will be perhaps the most crucial European (summit) in recent years ... a real test for Europe," European Commission President Jose Manuel Barroso said ahead of the Brussels meeting.
The most explosive question at the two-day summit is likely to be over a series of proposals which the commission - the EU's executive - agreed to in January to force the bloc to cut its emissions of greenhouse gases to 20 per cent below 1990 levels by 2020.