Progress seen unlikely before sherpas meet next week.
Chinese, Russian leaders unlikely to be in Rome.
ROME, Oct 21 Reuters - The Group of 20 rich countries are divided over phasing out coal and committing to limit global warming to 1.5 degrees Celsius as they prepare for a crucial summit in Rome next week, sources familiar with the negotiations said.
The need to reduce emissions will be high on the agenda of the G20 gathering on Oct. 30 - 31, seen as a key stepping stone immediately ahead of broader United Nations climate talks, called COP 26, to be held in Glasgow, Scotland.
So far big polluters such as China and India have dug in their heels and little progress has been made since G20 energy and environment ministers met in Naples in July, said three sources, asking not to be named due to the sensitivity of the talks.
Countries are not moving, at the moment they are just making sure their positions are heard loud and clear, said one of the sources.
However he added that such intransigence was normal at this stage and any concessions were unlikely to come before G 20 climate sherpas meet face-to-face next Thursday and Friday, immediately before their leaders' weekend meeting.
Where I see the problem is in the commitment to 1.5 degrees and in the phase out of coal and fossil fuels by China, India and Russia, said another source, a G-20 minister.
In Naples, energy and environment ministers recognized the need to limit global warming to 1.5 degrees but fell short of a clear commitment to achieve the goal.
They also failed to reach unanimous agreement on fixing dates to end fossil fuel subsidies, halt international financing of coal projects and phase out coal power altogether, asking leaders to bridge the gaps at the upcoming Rome summit.
At least four G-20 leaders are not expected to come to Rome, including Russia's Vladimir Putin, at the helm of the world's largest greenhouse gas emitter, and China's Xi Jinping, head of the largest energy producer.
One source said that while such absences were not a great political signal, they would not necessarily prevent progress.
Neither Russia, China nor India have committed to achieving net zero carbon emissions by 2050, considered a vital goal in limiting global warming to 1.5 degrees.
So far India is proving most reluctant to commit to the 1.5 degree ceiling, while China is most intransigent in not pledging net zero emissions by 2050, one of the sources said.
China and India are also among a group of countries that have not yet presented new national plans, known as Nationally Determined Contributions NDCs ahead of COP 26, on how they will help curb climate change.
The COP 26 president, Britain's Alok Sharma, said in a speech this month that the G 20, which accounts for 80% of global emissions, would be make or break for achieving success in Glasgow.
However, one of the sources said breakthroughs were more likely in Rome than in Glasgow.
Big emitters like China, India and Russia tend to feel pressured and hectored by the Western countries at the G20, he said, making them defensive and reluctant to concede ground.
The much larger UN forum was more conducive to compromise, he said.
The Rome G 20 will also focus on the coronavirus pandemic and how to foster global economic recovery, Italian Prime Minister Mario Draghi, who will chair the meeting, said on Wednesday.