US congressional Democrats led by House Speaker Nancy Pelosi, eager to repair damage caused by the US withdrawal from the Paris Agreement under Donald Trump, told COP26 on Tuesday that "America is back" to lead on climate.

The 20-strong delegation at the UN climate talks included the chairs of key committees in the US House of Representatives, along with junior members such as Alexandria Ocasio-Cortez, elected in 2018 in part on a platform of action to confront the threat of global warming.

"America is back on the international stage as a leader on climate action and drawdown" of greenhouse gas emissions, said Ocasio-Cortez, a main architect of the Green New Deal that helped shape major pieces of legislation.

On Saturday, US President Joe Biden hailed the passage of his $1.2 trillion dollar infrastructure plan, which includes billions for electric vehicle charging stations, and tens of billions for climate resilience measures.

A vote, however, on the even bigger Build Back Better bill, which earmarks hundreds of billions for climate action, has been delayed and its passage — at least as currently written — remains in question.

"We come here equipped, ready to take on the challenge and meet the moment," Pelosi said at a second press conference.

"This is all about the children, leaving them a world were they can be healthy, more secure, and more in reach of their fulfullment."

– US credibility –

Congresswoman Veronica Escobar, whose district includes the city of El Paso straddling the US-Mexican border, linked climate to the flood of US-bound migrants from Central America.

In 25 years of working on immigration issues, she said, "I have never before seen so many migrants who are fleeing their homelands because of climate change."

Drought and shifting weather patterns have disrupted rain-fed agriculture, and the region has been devastated by increasingly severe storms and drought.

"If we think that the migrant situation we are seeing in America is bad today, it is going to get become exponentially worse over the next several years," she added.

The arrival of Biden in the White House has helped to restore US credibility in Glasgow, but veteran diplomats at the 196-nation UN talks — which have dragged on for a quarter century — remain wary.

"We lost a number of years because of the US withdrawal," said Laurence Tubiana, who helped craft the 2015 Paris climate treaty at France's chief negotiator. "We have to make up for that."

The United States also turned its back in 2001 on the Kyoto Protocol, fatally crippling the treaty, which imposed mandatory carbon pollution cuts on some 40 rich nations.

When asked whether the US had recovered its "moral authority" on climate, Ocasio-Cortez acknowledged the damage done.

"No, we have not," she said. "We have to actually deliver the action in order to get respect and authority internationally."

Passing the Build Back Better act would go a long way towards doing that, she added.

The COP26 negotiations, running through Friday, are tasked with capping global warming at 1.5 degrees Celsius, and providing finance so that developing nations can cope with future impacts and deal with those that have caused devastation.

COP26 hit: 'Climate stripes' showing 170 years of global warming
Reading, United Kingdom (AFP) Nov 9, 2021 –

A striped design showing the impact of global warming on 170 years of world temperatures at a glance has become a hit at the UN's COP26 climate summit in Glasgow.

The lined red and blue image, which shows global average temperatures from 1850 to 2020, has been on display at the talks in exhibitions on sustainability, adorned face masks and clothes and even graced the wall of the summit's cafeteria.

Professor Ed Hawkins, the climatologist who created the design, told AFP it was "pretty staggering" to see the image across the venue as he attended the talks in Scotland's second city last week.

"It's a very stark visual, which communicates very simply and very quickly the fact that the planet has warmed very rapidly," Hawkins said at Reading University in southern England where he created the design.

The image, which has become known as the "climate stripes", is created with one line of colour for each year going from left to right.

Blue shades indicate colder years and red tones the warmer ones.

"It's a striking representation of how the planet has warmed, particularly over the last 30 or 40 years," Hawkins said.

The climatologist came up with the design in preparation for a Welsh literary festival.

"I could immediately see the audience recognise what was going on," he said.

"Many people can understand scientific graphs and axes and numbers. But many people find that difficult. And so having a range of options to communicate to different audiences is absolutely critical."

With the help of a viral online campaign, #ShowYourStripes, Hawkins' design has gone on to have a life of its own and has appeared at rock concerts and London Fashion Week.

While he admits this kind of exposure for his work is of a kind that "scientists don't expect to see", the graphic has provoked discussion in unusual places.

"We need to ensure that the climate crisis is talked about every day, it becomes part of our national conversation, because that is the way that we can get people to respond to the challenges ahead," he said.

"And that is why it's so great to see them being used by knitting groups or by rock bands or by fashion designers to start conversations."