BRUSSELS (Reuters) - European Union leaders committed themselves on Friday to adopt ambitious legislation within one year to fight climate change and promote green energy sources, EU president Slovenia said.

"We adopted the timeframe and the principles for the climate change and energy package," Slovenian Prime Minister Janez Jansa told a news conference after a summit at which leaders pledged to enact laws by March 2009 to meet goals of slashing greenhouse gas emissions.

(Reporting by Marja Novak, writing by Paul Taylor)