(Corrects date to June 4 in paragraph 7)

By Erik Kirschbaum

BERLIN, May 28 (Reuters) - U.S. House of Representatives Speaker Nancy Pelosi urged President George W. Bush on Monday to forge a compromise with other G8 countries on plans to fight climate change at a summit in Germany next week.

The head of the opposition Democrats said she and a bipartisan delegation of congressional leaders had visited Greenland and seen how global warming was threatening the livelihood of people who were not to blame.

"We hope that we can all assume our responsibilities ... and that our administration will be open to listening to why it is important to go forward, perhaps in a different way than we proceeded in the past," Pelosi said.

The United States, the world's largest emitter of carbon dioxide caused by burning fossil fuels that scientists say is nudging up global temperatures, has given no sign it is open to compromise at the G8 meeting.

In fact, the United States wants key targets and timetables for combating global warming -- including a pledge to halve emissions by 2050 -- removed from a draft summit communique.

Germany hosts the June 6-8 meeting of Group of Eight leaders that will focus on climate change. Chancellor Angela Merkel wants the club to agree steps to halt global warming to prepare the ground for an extension of the Kyoto Protocol beyond 2012.

Senior officials from G8 countries would meet again in Berlin on June 4 to try to work towards a deal for G8 leaders at the Heiligendamm summit, one European official said. Another confirmed there would be a meeting of so-called G8 sherpas next week. Bush and Merkel are also planning a pre-summit meeting.

Pelosi told journalists she would meet Merkel on Tuesday "to personally congratulate her, and thank her, for her leadership".

Merkel faces resistance from Washington, which refused to sign up to Kyoto and opposes binding emission cut targets despite U.N. reports warning of rising sea levels, droughts and floods linked to climate change.

"This trip for us began in Greenland where we saw first-hand evidence that climate change is a reality," Pelosi said. "There is just no denying it. We saw the impact on the local people there, on their hunting, their fishing, their economic survival.

"And it wasn't caused by the people in Greenland. It was caused by the behaviour in the rest of the world."

"The science is clear, the challenge is undeniable," Pelosi said. "We have to work together, though, to reach a solution."

On Friday, Washington signalled its fundamental opposition to Germany's G8 climate change position, according to a draft of a communique to be presented at the June 6-8 meeting.

"We have tried to 'tread lightly' but there is only so far we can go given our fundamental opposition to the German position," the U.S. said in comments in the draft communique.

The G8 is composed of Britain, Canada, France, Germany, Italy, Japan, Russia and the United States.

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