U.N. climate chief Yvo de Boer said on Wednesday that it is important for the industrialized countries to show "ambition" in fighting climate change by setting emission cut targets.
Elaborating on some developed countries' emission targets, de Boer told a press conference that "It's important (for countries to indicate emission targets) because all the industrialized countries need to show their ambition."
The United States, which rejected the Kyoto Protocol, has indicated that it will cut down its greenhouse gas emissions to the 1990 levels. At present, the U.S. emissions are 14 percent above the set target.
The 27-member European Union pledged to cut its emissions by 20-30 percent below the 1990 levels by 2020.
The U.N. Framework Convention on Climate Change (UNFCCC) is convening its annual meeting in Poznan in central Poland to build up a deal in Copenhagen next December.
Due to financial crisis and the pending U.S. position on fighting climate change, expectations are low for any meaningful outcome from this meeting.
"In Kyoto, we have built a completely new pact from the ground ...What we're working on in the context of Copenhagen is action to enhance what we already have," de Boer said.
Experts, however, worry that there might be delay in sealing a Copenhagen deal next December if the contagious financial crisis lingers on.
The two-week Poznan talks on climate change started on Monday and will culminate in the high-level discussions attended by ministers on Dec. 11.