Former US President Barack Obama will join current president Joe Biden at the Cop26 climate summit in Glasgow, it has been announced.
Obama is expected to meet young climate change activists and highlight their work around the world.
The former president will also use his trip to Scotland to lay out the progress made in the five years since the Paris Agreement took effect.
He will urge more robust action on climate change by governments, the private sector, philanthropy and civil society.
Obama’s visit will give the UN summit a boost after China’s President Xi Jinping pulled out – although the country will be represented by its government officials.
Pope Francis also announced earlier this month that he will not travel to Scotland for the conference after earlier saying he would like to do so.
Australia’s Prime Minister Scott Morrison confirmed on Friday he will be at the summit, after weeks of hesitation.
Australia is a large producer of coal and gas and Morrison is under pressure to commit to stronger climate action.
Cop26, which gets under way on October 31 and lasts two weeks, is the biggest climate change conference since talks in Paris in 2015.
More than 120 heads of state will be at the conference, including UK Prime Minister Boris Johnson and other leaders of the G7 nations who are set to lay out plans to cut emissions causing climate change.
Tens of thousands of campaigners and businesses will also be there to hold events and stage protests.
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