As it happened: 'If Glasgow fails, whole thing fails', says Johnson
That's all for now - we'll be back tomorrow
After a very busy day of speeches and announcements from Rome and Glasgow, that's us done for today.
Our live coverage was produced by Jen Meierhans, Paul McLaren, Victoria Lindrea, Kelly-Leigh Cooper and Yaroslav Lukov. It was edited by Kevin Ponniah and Tiffany Wertheimer.
We'll be back tomorrow morning, as world leaders descend on Glasgow and finally get into the conference venue.
See you then, but if you want more now - read this on what the climate summit could mean for all of us.
Sturgeon supports COP26 despite Scotland 'not being at top table'
World leaders are heading to Glasgow tonight, ahead of their meetings tomorrow for COP26.
Scotland's first minister Nicola Sturgeon has said she will do everything possible to help make it a success, despite not being at "the top table in discussions".
Speaking earlier as world leaders arrived in Glasgow, Sturgeon said: "Scotland is welcoming the world to what may be the most important international conference of this century.
"Once world leaders are all in the same room, they must seize the moment and agree the necessary steps to prevent catastrophic temperature rises.
"And when they leave Glasgow, they must return home carrying a message of hope for humanity's future."
Biden pays tribute to Pope Francis
President Biden was asked a range of questions by journalists at his G20 news conference, and became visibly moved while answering one about his debates and splits within Catholicism and his personal relationship with Pope Francis.
"Pope Francis has become - I don't want to exaggerate - someone who has provided great solace for my family when my son died," he told the media.
The president said he lost "the real part of his soul" when his son Beau died in 2015, and recounted a story of how, days after Beau's death, Biden met the Pope during a visit to the US while working under then-President Barack Obama.
"Before he left and got on the plane, the Pope asked whether or not he could meet with my family and we met in a hanger in Philadelphia airport," Biden said - adding the meeting had a "cathartic impact" for his family.
"He's just a fine, decent, honourable man and we keep in touch," he added, before leaving the stage.
Glasgow has Antarctic glacier named in its honour
Glasgow has been honoured in a unique way for hosting COP26 - with an Antarctic glacier being named after the city.
The 100km-long ice stream is in a region of the White Continent known to be experiencing rapid melting.
Eight other nearby glaciers will also carry the names of cities where important climate reports were issued, or policies were agreed.
They include Geneva, which held the very first climate conference in 1979.
Biden stresses environmental benefits of US-EU steel tariff deal
At the G20, a newly announced US-EU trade agreement on steel and aluminum tariffs had all the makings of an economic event.
But - ahead of COP26 - US President Joe Biden and EU Commission President Ursula Von der Leyen made it an environmental one.
Biden announced the US was dropping Trump-era tariffs on European steel and aluminum – with the EU also promising to end its retaliatory tariffs.
While Biden touted the economic benefits of the move, he emphasised the agreement’s hoped-for environmental impact, stressing the deal would incentivise emission reductions in steel production and restrict access to the US and EU markets for “dirty steel” from places such as China.
Noting that steel production is one of the most carbon-intensive sectors of the global economy, he said the US and EU had agreed to a “carbon-based arrangement”.
Von der Leyen, for her part, said the agreement was the start of “a new global, sustainable steel arrangement”.
Biden defends renewable plans
The president has finished taking media questions now, and left the stage.
He was also asked about his Build Back Better framework's climate policies.
He's asked if his incentives toward renewable energy go far enough, and also about potentially introducing punitive measures to hold companies accountable.
"Everyone knows which direction it's going," he says in defence of his carrot-and-stick approach with US industry.
Biden says Russia and China 'not showing up'
Biden opens up the floor to questions from the media.
The president is asked if the world can be confident that the US will make good on its climate promises without him having the votes in Congress on bills to authorise funding. He says he remains confident his plans will pass.
He then addresses disappointment by some about what was agreed at the G20 ahead of COP26.
Mr Biden says China and Russia "basically didn't show up" on matters of the climate and says he "found it disappointing".
Biden hails 'productive' G20
It seems the delay had something to do with an elevator - the president apologises and says it's a long story... but begins addressing the media in Rome.
He describes a "series of very productive meetings" at the G20 news conference and says he is "looking forward to continuing to make progress" on climate issues in Glasgow.
He speaks about the new global minimum tax agreement on big businesses - describing it as an "incredible win" for all countries.
The president also addresses issues of supply chain issues at home in the US and speaks about the hard-fought infrastructure deal his administration is trying to get passed in Congress.
Biden addresses media
And President Biden has just begun his news conference in Rome.
We're still waiting for President Biden...
It seems like his post-G20 press conference will be a little later than expected.
It's now after 20:15 local time in Rome.
Hundreds of COP26 attendees stranded in London after storm
Climate change activists disappointed with G20 statement
While we wait for President Biden's news conference, let's take a look at some of the reaction from the G20 agreements.
As we've been hearing from Italy's PM, the leaders of the world's richest economies - the G20 - have pledged to pursue efforts to limit global warming with "meaningful and effective actions".
But exactly how this will be achieved was not revealed in their statement leaving activists "disappointed".
Their closing statement, called a communiqué, makes no reference to achieving net zero by 2050, which many countries have already pledged to do and scientists say is critical to avoiding a climate catastrophe.
Italy's PM said they are committed to net zero by "mid-century", but China - the world's worst polluter - and Russia have pushed their deadline out to 2060.
The communiqué does pledge, however, to stop financing new, unabated coal plants internationally by the end of this year - a strong message to coal-reliant nations such as China, Russia and India. But the G20 leaders stopped short of agreeing to end coal power in their own nations.
Oscar Soria, of the activist network Avaaz, told the Reuters news agency there was "little sense of urgency" coming from the group, adding: "There is no more time for vague wish-lists, we need concrete commitments and action."
‘I’m proud to tell people how friendly Glasgow is’
As world leaders start to arrive in Glasgow, a 1,000-strong team of volunteers have taken to the streets of the Scottish city to play their part in COP26.
The volunteers will be on hand with local information to help the expected 25,000 visitors get around the city.
They will be based at key transport hubs and travel routes including Buchanan Street bus station and along Lancefield Quay on the Clyde.
For many, the event - which runs until 12 November - is about promoting Glasgow on a global stage.
Cynthia Tjipuka, who moved to Scotland from Namibia 10 months ago, is thrilled at the prospect of being able to help showcase her adopted home city.
She said: "I'm seriously honoured and humbled to be part of such a huge event. This is a life-changing event for our future generations and for the planet."
G20 produced vague promises and platitudes - Oxfam
Global poverty charity Oxfam says the G20 group of the world's richest countries have offered "vague promises and platitudes" instead of providing "the lightning bolt that the COP26 climate talks so desperately need".
Oxfam’s senior adviser, Jörn Kalinski, says confirming the 1.5C goal of the Paris Agreement was a "minimum requirement" and without a promise to revise national climate plans "it is meaningless".
However, Kalinski says the promise to stop financing new coal power plants overseas by the end of this year was "one of the few positives" of the G20's statement.
The half-hearted words on financing adaptation in vulnerable countries were again not backed up by timeframes or targets. Without these, poorer nations will continue to lack the resources they need to protect lives, homes and businesses from weather disasters.