Warming 'Likely' Man-Made, Unstoppable

FILE - Dominique Voynet of the Green Party takes part to a television debate in Paris in this June 1, 2004 file photo. With environmental issues commanding unprecedented attention in France's presidential campaign, and an increasing sense of worldwide urgency over climate change, contenders from across the political spectrum are scrambling to beef up their ecological credentials ahead of the April-May vote. (AP Photo/Jacques Brinon) (Jacques Brinon - AP)

Nevertheless, scientists agreed the report is strong.

"There's no question that the powerful language is intimately linked to the more powerful science," said one of the study's many co-authors, Andrew Weaver of the University of Victoria, who spoke by phone from Canada. He said the report was based on science that is rock-solid, peer-reviewed, and consensus.

"It's very conservative. Scientists by their nature are skeptics."

The scientists wrote the report based on years of peer-reviewed research and government officials edited it with an eye toward the required unanimous approval by world governments.

In the end, there was little debate on the strength of the wording about the role of man in global warming.

The panel quickly agreed Thursday on two of the most contentious issues: attributing global warming to man-made burning of fossil fuels and connecting it to a recent increase in stronger hurricanes.

Negotiations over a third and more difficult issue _ how much the sea level is predicted to rise by 2100 _ went into the night Thursday with a deadline approaching for the report.

While critics call the panel overly alarmist, it is by nature relatively cautious because it relies on hundreds of scientists, including skeptics.

"I hope that policymakers will be quite convinced by this message," said Riibeta Abeta, a delegate whose island nation Kiribati is threatened by rising seas. "The purpose is to get them moving."

The Chinese delegation was resistant to strong wording on global warming, said Barbados delegate Leonard Fields and others. China has increasingly turned to fossil fuels for its huge and growing energy needs.

The U.S. government delegation was not one of the more vocal groups in the debate over whether warming is man-made, said officials from other countries. And several attendees credited the head of the panel session, Susan Solomon, a top U.S. government climate scientist, with pushing through the agreement so quickly.

The Bush administration acknowledges that global warming is man-made and a problem that must be dealt with, Bush science adviser John Marburger has said. However, Bush continues to reject mandatory limits on so-called "greenhouse" gases.