US President Joe Biden has told a major summit that we are in a “decisive decade” for tackling climate change.
The US has pledged to cut carbon emissions by 50-52% below 2005 levels by the end of this decade.
This new target, which was unveiled at a virtual summit of 40 global leaders, essentially doubles their previous promise.
The Americans hope that their ambitious new plan will encourage China, India and others to go further before the crucial COP26 meeting, in Glasgow in November.
But there will be some scepticism about the ability of the US to deliver on its new target, given the divided nature of American politics.
“Scientists tell us that this is the decisive decade – this is the decade we must make decisions that will avoid the worst consequences of the climate crisis,” President Biden said at the summit’s opening address.
“We must try to keep the Earth’s temperature to an increase of 1.5C. The world beyond 1.5 degrees means more frequent and intense fires, floods, droughts, heatwaves and hurricanes – tearing through communities, ripping away lives and livelihoods.”
Vice-President Kamala Harris added: “As a global community, it is imperative that we act quickly and together to confront this crisis.”
“This will require innovation and collaboration around the world.”
The UK is among the countries that have been keen to show their ambition ahead of the meeting. Earlier in the week, the prime minister, Boris Johnson, announced a “world-leading” target for the UK to cut emissions by 78% on 1990 levels by 2035.
The country is playing a critical role this year as president of COP26, and is tasked with achieving agreement in Glasgow when world leaders meet there in November.
At the summit, Mr Johnson called President Biden’s announcement about cutting US greenhouse gas emissions “game-changing”.
“We can do this together across the world. It’s going to mean the richest nations coming together and exceeding the $100bn commitment they already made in 2009,” he said.
Johnson ended his speech by saying “we can build back better, by building back greener”, referring to the job creation that can come with combatting climate change.
Biden’s ambition will be challenged
Climate has been the central focus of the Biden administration’s first few months in office.
As well as rejoining the Paris climate pact and organising Thursday’s summit, the Biden team have been working on a strong pledge to convince the world that they mean business.
Many commentators had pushed the US to go for a 50% cut in emissions as a clear signal of intent.
The fact that President Biden is prepared to go beyond this level will be a welcome surprise to many scientists and campaigners.
“By announcing a bold target of cutting emissions 50-52% below 2005 by the end of the decade, President Biden has met the moment and the urgency that the climate crisis demands,” said Nathaniel Keohane from the US Environmental Defense Fund.
“This target aligns with what the science says is necessary to put the world on the path to a safer climate, and vaults the US into the top tier of world leaders on climate ambition.”
The new pledge will mean huge changes to the American way of life. Coal will have to disappear from the electricity mix, while gas guzzling cars and trucks will have to go electric.
But announcing an ambitious target is one thing – turning it into reality is another.
While the Democrats have a majority in the House of Representatives, the Senate is essentially deadlocked, making the passage of new climate legislation rather tricky.
“It seems to me that President Biden is in a bit of a bind, and he has to deal with the Congress that he has,” said Samantha Gross from the Brookings Institution.
“But I believe that Congress, particularly the Republicans, haven’t really kept up with increasing concern among the American public about climate.”
US and China keen to co-operate
Among the 40 leaders attending the summit was China’s President Xi Jinping.
Despite serious tensions between the US and China on a host of issues, both sides seem keen to keep climate change separate from these disputes.
“We must be committed to harmony between man and nature,” President Xi told the meeting, during its opening session.
He re-stated China’s climate promises, including moving to sustainable energy sources and achieving carbon neutrality by 2060.
“China looks forward to working with the international community, including the United States,” said President Xi.
Speaking ahead of the meeting, a senior administration official had spoken warmly about the co-operative approach.
“It’s quite clear that there is a distinctly shared level of ambition. Both countries see this as a crisis. Both countries see the need for action in the 2020s. Both countries see the need to work towards holding the increase in global temperatures to 1.5 degrees,” he said.
But for other countries who have been slow to embrace action on climate change, the Biden team were less effusive.
Both Brazil and Australia’s sceptical approach to the issue had found favour in the Trump White House. That’s no longer the case.