UN climate report balances science and politics

After racing against the clock in an all-night session, the UN's expert panel on climate change was putting the final touches today on a scientific guide to help governments, industries and regular people take action to stop global warming from reaching dangerous levels.
As always when the Intergovernmental Panel on Climate Change adopts one of its high-profile reports, the weeklong talks in Berlin were slowed by wrangling between scientists and governments over which words, charts and tables to use in the roughly 30-page summary of a much bigger scientific report.
The painstaking process is meant to clarify the complex world of climate science to non-scientists but it also reflects the brinksmanship that characterises international talks on climate action so far unsuccessful in their goal to stop the rise of man-made carbon emissions blamed for global warming.

"Sometimes it's framed as if what the IPCC does is 'just the facts, ma'am,' and that of course is not accurate," said Steve Rayner, an Oxford scientist who has taken part in three of the IPCC's previous assessments, but not this one.
"It's not pure science and it's not just politics," but a blend of both, Rayner said.
In Berlin, the politics showed through in a dispute over how to categorise countries in graphs showing the world's carbon emissions, which are currently growing the fastest in China and other developing countries.

Like many scientific studies, the IPCC draft used a breakdown of emissions from low, lower-middle, upper-middle and high income countries.

Some developing countries objected and wanted the graphs to follow the example of UN climate talks and use just two categories - developed and developing - according to three participants who spoke to The Associated Press on condition of anonymity because the IPCC session was closed to the public.
In earlier submitted comments obtained by AP, the US suggested footnotes indicating where readers could "view specific countries listed in each category in addition to the income brackets."
That reflects a nagging dispute in the UN talks, which are supposed to produce a global climate agreement next year. The US and other industrialised nations want to scrap the binary rich-poor division, saying large emerging economies such as China, Brazil and India must adopt more stringent emissions cuts than poorer countries.