Simon Stiell says’ ‘we need highest ambition, not point scoring or lowest common denominator politics’. This live blog is closed

Countries negotiating at Cop28 must not fall into the trap of point-scoring and “lowest common denominator politics”, Simon Stiell, the UN’s climate chief, has said.

Stiell, who is executive secretary of the UN framework convention on climate change, the structure under the auspices of which the climate summit is held, spoke at a press conference in Dubai as Cop28 reached its midpoint. He said:

All governments must give their negotiators clear marching orders. We need highest ambition, not point scoring or lowest common denominator politics.

We have a starting text on the table … but it’s a grab bag of wishlists and heavy on posturing. The key now is to sort the wheat from the chaff.

For all intents and purposes, moving towards the phase-out of fossil fuel combustion is necessary to keep the 1.5C goal of the Paris Agreement within reach.

Scenarios consistent with this goal require a complete phase-out of coal by 2050 and rapid phase-down of oil and gas (halved every decade). After 2050 the world needs to rapidly move into net negative emissions, particularly after a number of decades of 1.5C overshoot.

Cop28 president and oil chief says phase-down and phase-out of fossil fuels is essential and says his comments were misrepresented

• Cop28 president says there is ‘no science’ behind demands for phase-out of fossil fuels

John Kerry, the US special envoy for climate was just asked on the BBC Radio 4 Today programme in the UK what he thinks of Damian Carrington’s scoop that Sultan Al Jaber said there was ‘no science’ behind demands for phase-out of fossil fuels.

He was very diplomatic in his response and appeared to give the oil chief and Cop28 president the benefit of the doubt.

“What you have to do is clearly reduce the emissions. They have made it clear we need a 43% minimum reduction in emissions by 2030, and we need net zero 2050 in order to meet the goal of keeping 1.5. We’ve got all kinds of ways of getting there. Renewables are the one technology we really know we can deploy today and it has the impact we need.”

“We are not only signed up to that, president Biden on behalf of the US voted to join the g7 where we said we must phase out unabated fossil fuel. We have to do that yes otherwise you cannot reach net zero by 2050. What we are trying to figure out is how we can capture those emissions, or reduce those emissions, or not make those emissions in the first place.

“I think the only question here is not whether or not you are going to reduce emissions, it’s what means are you going to use to go at this to provide the energy you want for your country but also keeping faith with the reduction of the emissions that are creating the climate crisis.”

This live blog is now closed

• Cop28 president says there is ‘no science’ behind demands for phase-out of fossil fuels

The British prime minister, Rishi Sunak, has been facing criticism at home for the brevity of his visit to the climate conference, having visited for less than a day. He has also been accused of hypocrisy for pushing for a phase-out of fossil fuels only weeks after approving new oil and gas licences in the North Sea.

Al Gore, the former US vice-president, said: “I am not impressed with prime minister Sunak’s climate policies. I think they’re terrible. They’re very disappointing.”

Hosts the UAE also signed the declaration, which drew a mixed reaction

For the first time at a Cop the UNFCCC, which organises the summits, has published the full list of participants in spreadsheet format, making them far easier to analyse.

Carbon Brief have looked at the provisional figures, and found that 84,101 people are registered to attend, 3,074 of whom are attending virtually.