Toyako, Japan: Group of Eight (G8) leaders patched together a deal to fight climate change at a summit that wound up on Wednesday, but failed to convince big emerging economies that rich countries were doing enough.

Climate change was the most contentious topic at this year's G8 summit in Japan, which also tackled political problems from the crisis in Zimbabwe to worsening security in Afghanistan as well as soaring food and oil prices and poverty in Africa.

"There's been no huge breakthrough at this particular meeting, it is one step along the road," said Australian Prime Minister Kevin Rudd, who attended a climate change meeting yesterday where the G8 leaders were joined by eight more big polluters. "Of course, there's a long, long way to go." That 16-member Major Economies Meeting group agreed that "deep cuts" in greenhouse gas emissions were needed to combat the global warming that is closely linked to rising prices already hitting vulnerable economies hard.

But bickering between rich and poorer countries kept most emerging economies from signing on to a goal of at least halving global emissions by 2050. Nor did the broader group come up with specific numbers for the interim targets they agreed advanced countries should set.

EU leader Jose Manuel Barroso, said, however, that to focus on the divisions would be missing the point. "It is quite wrong to see this in terms of a confrontation between developed and developing countries," he said.

"Of course we accept the lion's share of responsibility but this is a global challenge, which requires a global response."

Together

The leaders of Japan, Britain, Canada, Germany, France, Italy, Russia and the US had embraced the 2050 goal a day earlier, but stressed their countries could not do it alone.

The rich countries had to paper over deep gaps just to get their own climate change deal, with Europe and Japan urging bolder action while the United States opposed promising firm targets without assurances big emerging economies will act too.

US President George W. Bush said 'significant progress' was made on climate change at the summit.

Buried in time

Group of Eight (G8) leaders meeting here wrangled over the timeframe to fight global warming, but they have a set deadline when their pledges will be reviewed - in 100 years.

Their summit documents, along with current newspapers, will be buried in a time capsule at the luxury hotel where they met for three days in the mountain resort of Toyako in northern Japan.

The Windsor Hotel Toya will dig up and open the time capsule on July 7, 2108. "We hope to confirm that the summit will have been remembered for 100 years as a key conference on climate change and that by then global warming will be halted as promised by the leaders," a hotel spokesman said. The time capsule will be put in a new park along with a monument with the engraved autographs of the G8 leaders and a sculpture representing a chunk of ice melting due to global warming.