The president of the U.N. climate talks said on Tuesday there was still a mountain to climb toward a goal of capping the global temperature rise at 1.5 Celsius, as a research group said existing pledges would allow the Earth to warm far beyond that.

Britain's Alok Sharma told reporters that COP26 officials would soon publish the first draft of the so-called cover decision, which summarizes the commitments of more than 190 countries, in a bid to focus minds in the three days remaining.

Climate activists and experts will pore over the document looking for items such as timelines to phase out public subsidies of fossil fuels, or provide long-promised funds to help poor countries tackle climate change.