TOYAKO, Hokkaido — The Group of Eight powers agreed Tuesday to "seek to share" with both developing and developed states the goal of at least halving global emissions of greenhouse gases by 2050, showing only scant progress from last year's summit in fighting global warming.

The G8 nations also agreed to set a midterm emissions-reduction goal for themselves, although no numbers were mentioned in their joint statement on climate change.

Tuesday's agreement, reached during a working lunch on the second day of the G8 leaders' annual summit, may help Prime Minister Yasuo Fukuda save face as the G8 host after struggling to forge a meaningful consensus on climate change issues.