China and the US pledge to work together on climate action, saying they recognise "the urgency of the climate crisis"
The two countries are the world's biggest emitters of carbon dioxide and US climate envoy John Kerry says it marks a "new step"
The BBC's environment correspondent says regardless of the agreement's contents, it hands COP26 a boost
Negotiations are going into overdrive in Glasgow to try and secure an ambitious agreement before COP26 ends on Friday
UK PM Boris Johnson earlier urged delegates to "bridge the gap" between long-term goals and immediate action to "keep 1.5 alive"
A draft agreement calls on governments to strengthen their climate targets by the end of 2022, putting pressure on big emitters
Saudi Arabia denies it is obstructing progress towards a strong deal, calling such allegations "a cheat and a lie"
We are ending our live coverage of COP26 for the day - but will be back again tomorrow.
Wednesday's live page was edited by Lauren Turner and Marie Jackson. Our writers today were Alex Kleiderman, Paul McLaren, Toby Luckhurst, Kelly-Leigh Cooper, Jen Meierhans, Jack Hunter and Max Mazta.
It's been a busy day at COP26. Here's what's been happening:
The final question is about the US's ability to deliver on its own climate promises under the Paris Agreement.
Kerry says: "The answer is yes we will."
He says the "aggressive" $1.7 trillion infrastructure bill just passed will have many of the things the US needs to do to help climate change such as electric charging stations across the country.
He says 50% of all the cars sold in the US in 2030 will be electric and by 2035 hopefully all of them.
US climate envoy John Kerry cracks a slight joke while commenting on when both countries expect Chinese greenhouse gas emissions to peak.
"President Xi has set a time frame for when he sees a peak. We have had lots of discussions about peaking.
"We peaked out on peaking."
"We embraced, I think, what we know to be the science," he continues, adding that there is a chance that the data is wrong about when emissions will peak.
China has said that they expect emissions to peak by 2030, if not before.
The next question is from Reuters news agency which asks how the US addressed the issue of China's use of forced labour for building solar panels?
He says: "We are honest about the differences...but that's not my lane here. My job is to be the climate guy and stay focused on trying to move the climate agenda forward."
He says the presidents made it clear when they talked in February that while they have differences, it was important to focus on global crises.
Image source, Getty Images
Image source, AFPNow to questions at the US press conference.
The first is whether the deal includes anything on the use of coal in China.
John Kerry says China has laid out its current timetable and the things its going to do to reduce emissions.
But what this agreement does is underscores that there is a plan in place, he says.
He reads what he calls some "important paragraphs" about the intention of the two sides to continue concrete actions in the 2020s to reduce emissions - but does not specifically mention coal.
He says: "But the whole point of this is that the steps we are taking we believe can answer questions people have about the pace at which China is going and help China and us and others to be able to accelerate their efforts."
Matt McGrath
Environment correspondent
Perhaps the most important clue as to the significance of this statement is in the last bit of the title - a joint declaration on enhancing climate action in the 2020s.
If the world wants to keep the 1.5C temperature threshold in sight, then the steps taken to limit carbon emissions in the next nine years are absolutely critical.
While China has been reluctant to take action to tackle its domestic coal emissions in the short term, this statement is a recognition of the urgency of action.
So the joint steps agreed - on methane, forests and technology transfer - are important symbolically and also potentially in emissions terms.
The agreement is also a recognition by both sides that there is a massive gap between the efforts of countries to limit emissions to date and what science says is necessary for a safer world.
Closing that gap means a strong agreement here in Glasgow.
The optics and timing of this statement, regardless of the contents, certainly give that a boost.
Image source, Getty Images"Now, with this announcement we've arrived at a new step," Mr Kerry continues, calling this moment a "roadmap" for the future.
This statement makes it "an imperative to co-operate," he says, referring to the deal that the US and China have just agreed.
The US climate envoy adds that both sides have agreed to "work together to limit methane emissions".
He said that China's pledge to create "a comprehensive and ambitious national action plan on methane" will have a "significant effect" on the climate crisis.
"The US and China have no shortage of differences, but on climate, co-operation is the only way to get this job done."
He appeals to all countries to work together, as the two largest emitters are doing today, and adds "that he looks forward to stepping up our work with China".
Image source, ReutersJohn Kerry, the US climate envoy, is speaking in more detail about the US-China climate deal.
He says it sets out how together the nations will take action at COP26 as well as in the years to come.
He says US President Biden and China's President Xi had a conversation a few weeks ago and they agreed to work together to raise climate ambition.
He says the US and Chinese teams have worked together for months and have met 30 times both virtually and in person.
They've agreed to a basic framework and shared desire for success on mitigation, adaptation, support and all of the key issues. The deal is a roadmap for our present and future collaboration on this issue, he says.
"We need to do it far faster in this decisive decade - not because China or the US say that we must - but because science says we must," he says.
The text of the US-China climate deal has just been released.
The bilateral statement says both sides "recognise the seriousness and urgency of the climate crisis" and will work to address the issue together.
The document says that both sides will "recall their firm commitment to work together" to achieve the 1.5C temperature goal set out in the Paris Agreement.
They also call for "stepped-up efforts" to close the "significant gap" that remains to achieve that goal.
Both sides pledge to co-operate on regulatory standards, the transition to clean energy, de-carbonisation and "green design and renewable resource utilisation".
They also pledge to tackle methane emissions. China refused to join an agreement earlier this week to limit methane - a harmful greenhouse gas. The deal was signed by nearly 100 other countries. China has instead pledged to develop a "national plan" to address methane.
The document says that both also pledge to form a working group that will meet regularly to discuss climate solutions.
We're hearing more from China's top climate negotiator Xie Zhenhua on details of the new US-China declaration. It appears to be quite thin on specific details and concrete targets.
Calling climate change an "existential" crisis for humanity, Xie says the declaration will address clean energy, clean coal, methane reduction and banning deforestation.
China will "develop a national plan" on methane, he says, and encourage "joint research" on the greenhouse gas.
The two sides are also committing to "strengthen goals" on deforestation, he adds.
"In areas of climate change there is more agreement between China and US than divergence," Xie says.
The US and China have released a rare joint declaration pledging action on climate change.
The document, called "enhancing climate action in the 2020s", commits the countries to develop long-term strategies to reach net-zero.
Xie Zhenhua, China's top climate negotiator, is explaining what's in the statement at a press conference in Glasgow.
He says the declaration - agreed this afternoon - commits the two countries to "concrete measures" to achieve the Paris Agreement goals of keeping global warming below 2C and "pursuing efforts" to limit it to 1.5C by the end of the century.
"We committed to adopt enhanced climate actions in order to achieve the Paris agreement goal and strengthen its implementation," he adds.
Some unexpected news this evening.
We are now expecting a joint declaration on climate action from China and the US shortly. These two countries are the world's largest emitters of carbon dioxide.
A spokeswoman for the Chinese delegation said China's top envoy would speak at 18:00 GMT.
It's unclear what will be announced and it looks like even though it's a "joint declaration" that the delegations will hold separate press briefings, with the US following at 18:30.
We'll bring you the latest as we get it.
Adam Fleming
Chief political correspondent
Boris Johnson called on world leaders to give their negotiating teams in Glasgow more leeway to reach a deal.
He didn’t name any countries as blockers but he seemed to pin the blame for any hold-ups on richer countries who had "patted themselves on the back" after the Paris climate change agreement was negotiated in 2015 but had "defaulted" on their promises to developing countries since then.
He then clarified that progress basically came down to one thing: money.
But he must be worried about what the current saga around MPs' second jobs is doing to the host country’s international reputation, asserting that the UK wasn’t corrupt in response to a journalist who hadn’t asked if it was.
And he raised the prospect of what happens at every COP conference happening here – negotiations overrunning. He said talks might have to go into ”extra time” despite the COP Presidency’s insistence that they will finish on Friday at 6pm.
Here's a quick recap of the main points Boris Johnson made.
He admits whether we can keep to the 1.5C temperature rise target is "in the balance".
During his speech, and in answers to journalists, he also says:
The PM says it is frustrating "to see countries that have spent six years conspicuously patting themselves on the back" for signing that agreement now "quietly edging towards default".
But Johnson adds that, as seen in Glasgow, the world is closer than it has ever been to signalling the beginning of the end of anthropogenic climate change. "It is now within reach," he says.
He concludes by saying: "So my question to my fellow world leaders as we enter the last hours of COP26 is: will you help us do that? Will you help us grasp the opportunity or will you stand in the way?"
WATCH: Johnson warns of 'immense' backlash if negotiations fail
After his statement pushing for further climate action and taking a handful of questions from journalists, the PM ends his press conference.
"I'm very sorry to tell you I have to go and catch a climate-friendly means of transport back to London," he says, giving a thumbs up and leaving the stage.
Johnson, who went to Glasgow today by train, faced criticism last week for flying back from the summit.
Jitendra Joshi from AFP asks the PM what tangible difference his presence at the summit has made and if positive at all why doesn't he stay until the end of get the ball over the line.
And he asks if the PM is confident that his own actions as an MP and minister would pass any standards investigation.
The PM says all his declarations conform to the rules and are there to be studied.
He says what he's tried to do at COP26 today is to listen to what the NGOs have to say and speak to ministerial negotiating teams and encourage them to make progress.
They've been working unbelievably hard but progress will depend on finance, he says.
The Telegraph newspaper asks Mr Johnson what his message would be to voters about headlines saying Tory sleaze has returned.
On COP, the newspaper asks if he has any messages for specific countries about their responsibilities and actions at the conference.
"I genuinely believe the UK is not remotely a corrupt country, nor do I believe our institutions are corrupt," Johnson says. "We have a very tough system of parliamentary democracy and scrutiny, not least by the media - and I think everyone can see that."
Johnson then adds he doesn't want to single out any country for "chivvying and hectoring".
But he does call on leaders to call up their negotiators and urge them "to make progress".
Image source, Climate Vulnerable ForumBoris Johnson is asked by ITV's Robert Peston about what can be done in the remaining days of the conference to keep the ambition of capping the global temperature rise at 1.5C alive.
The prime minister says "we're now finding things tough" after an initial surge of progress in the first few days of the conference.
"But that doesn't mean it's impossible," he says of the temperature goal, again urging world leaders to call their negotiators with more leverage power.
"I still think we can achieve it but I'm not going to pretend to you - by any means - that it is a done deal," he adds.
Sky's political editor Beth Rigby asks if the PM accepts that the summit could end up as the start of many months of negotiations.
Johnson says the summit is "not going to fix it in one go, we are not going to arrest climate change right here, right now".
But if things go well in the remaining hours, there is the possibility that we will come away from this with the first genuine roadmap to tackle climate change, he says.
Rigby also asks if Johnson believes MPs have been putting their political roles first.
He says he will not comment on individual cases but, those who do break the rules and do not put constituents first, should face appropriate sanctions and punishment.