The US climate envoy John Podesta said the fight “for a cleaner, safer” planet will not stop under a re-elected Donald Trump even if some progress is reversed, speaking at the Cop29 UN climate talks on Monday as they opened in Baku, Azerbaijan.“Although under Donald Trump’s leadership the US federal government placed climate-related actions on the back burner, efforts to prevent climate change remain a commitment in the US and will confidently continue,” said Podesta, who is leading the Biden administration’s delegation at the annual talks.Trump has pledged to deregulate the energy sector, allow the oil and gas industry to “drill, baby, drill”, and pull the US from the Paris climate agreement, which committed countries to taking steps to avoid the worst impacts of the crisis. Yet while Trump will try to reverse progress, “this is not the end of our fight for a cleaner, safer planet”, Podesta said.Last week’s re-election of Trump to the White House, which will see him inaugurated for a second term in January, has cast a shadow on the UN talks after the Republican defeated Kamala Harris. Harris had been expected to continue the climate policies of Joe Biden, who passed the Inflation Reduction Act, the largest down payment on the green transition seen in US history.Experts say Trump’s second term could be even more destructive, as he will be aided by an amenably conservative judiciary and armed with detailed policy blueprints such as the Project 2025 document published by the rightwing Heritage Foundation.Trump’s incoming administration is already reportedly drawing up executive orders to erase climate policies and open up protected land for ramped-up oil and gas production. “We have more liquid gold than any country in the world,” the president-elect said on Wednesday.Staff at the US Environmental Protection Agency, which was targeted the last time Trump was president, are already bracing for a mass exodus. Swaths of work done by the EPA under Biden, such as pollution rules for cars and power plants, as well as efforts to protect vulnerable communities living near industrial activity, are set to be reversed.A June analysis warned that Trump’s forthcoming rollbacks could add 4bn additional metric tons of carbon dioxide emissions to the atmosphere by 2030 when compared with a continuation of Biden’s policies. That “would be a death sentence to our planet”, said Jamie Minden, the 21-year-old acting executive director of Zero Hour, the US-based youth-led climate non-profit, at a press conference about the election result in Baku on Monday.Trump’s looming presidency could also place a damper on other countries’ climate action plans, said Todd Stern, who was the US special envoy for climate change and the United States’ chief negotiator at the 2015 Paris climate agreement – especially China, which is currently the top global contributor to planet-warming emissions.“The two biggest players in the ring are the US and China, and China is extremely aware of that. It has just got a guarantee that the US president won’t be bringing up climate change with them for the next four years and that means something,” he said. “It will make things easier on China and that can’t help but have some impact.”Yet “the fight is bigger than one election, one political cycle in one country,” said Podesta. The UN climate conference in Baku represented a “critical opportunity to cement our progress”, he said.At Cop29, activists are pushing the Biden administration to file a bold climate plan under the Paris climate agreement – known as a nationally determined contribution – and to make big pledges to support global climate finance efforts.And the president “still has critical opportunities to cement his climate legacy” on the domestic level as well, said Allie Rosenbluth, co-manager of the climate NGO Oil Change International, including by rejecting pending permits for fossil fuel projects.At least $1tn is needed to help poor countries reduce their greenhouse gas emissions, shift to a low-carbon economy and adapt to the impacts of climate disasters. If the US fails to meaningfully contribute, other countries can also fill the climate finance gap left by the US, noted Teresa Anderson, the global climate justice lead at the climate non-profit ActionAid, at another Monday press conference.“This is a test for rich countries,” she said. “If they believe in the climate emergency then they should be willing to pay more than their fair share, not less.”The US senator Sheldon Whitehouse, a climate hawk who will arrive at Cop29 later this week, said Trump and other US Republicans were “aiming a torpedo” at climate progress, but that the pressure to slash US emissions would stay strong.“I’m heading to Baku to reassure the international community that large swaths of the US remain committed to steering the planet away from climate catastrophe, a catastrophe that is already doing massive economic harm and driving up prices for insurance, food, and other goods and services,” he wrote in an email.Tina Stege, climate envoy for the Marshall Islands, noted that the Paris agreement had 195 signatories and “will not collapse in the face of a single election result”.“The Paris agreement has survived one Trump presidency and it will survive another,” she said. 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