Biden heads to crucial climate talks as wary allies wonder if US will

The US president, who has vowed to tackle a climate crisis he has described as an “existential threat” to civilization, will be welcomed to the Cop26 talks with a sense of relief following the decisions of his predecessor, who pulled his country out of the landmark Paris climate agreement and derided climate science as “bullshit”.

But Biden, who departed to Europe on Thursday and arrived in Rome on Friday morning for a G20 summit, will head to Glasgow with his domestic climate agenda whittled away by a recalcitrant Congress and a barrage of criticism from climate activists who claim Biden’s actions have yet to match his words.

This disconnect has perturbed delegates keen to see a reliable American partner emerge from the Trump era, amid increasingly dire warnings from scientists that “irreversible” heatwaves, floods, crop failures and other effects are being locked in by governments’ sluggish response to global heating.

“The US is still the world’s largest economy, other nations pay attention to it, and we’ve never had a president more committed to climate action,” said Alice Hill, who was a climate adviser to Barack Obama. “But there is skepticism being expressed by other countries. They saw our dramatic flip from Obama to Trump and the worry is we will flip again. A lack of consistency is the issue.”

Laurence Tubiana, a French diplomat who was a key architect of the Paris agreement, said that Biden had put climate “at the top of his agenda” and that US diplomacy has helped eke some progress from countries such as Saudi Arabia, South Africa and India.

But she added the US had a “historical climate credibility problem” and that other leaders fret about its domestic political dysfunction and long-term commitment.

“We do worry, because it has happened before and could happen again,” she said. “The US is the world’s largest historical emitter and never passed a significant climate bill. [Biden] has still got a long way to go to make up for Trump’s lost years.”

In a show of soft American power, Biden is bringing a dozen of his cabinet members to Glasgow, where delegates from nearly 200 countries will wrangle over an agreement aimed at avoiding a disastrous 1.5C of global heating, a key objective of the Paris deal. But perhaps the most consequential figure to the American effort, rivaling the president himself, is remaining at home – the West Virginia senator Joe Manchin.

Manchin, a centrist Democrat, looms large at the talks having derailed the centerpiece of a landmark reconciliation bill that would slash US emissions. The White House still hopes the bill, which would be the first major climate legislation ever passed in the US, will help convince other…