Համաշխարհային առաջնորդները հավաքվում են ՄԱԿ-ի կլիմայի գագաթնաժողովին, բայց ամենամեծ աղտոտող երկրների ղեկավարները բացակայում են

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World leaders warned Thursday that time is running short for urgent and decisive action to prevent the worst effects of climate change, and blasted the United States for its retreat from those efforts, as they gathered at the edge of Brazil’s Amazon rainforest for the annual United Nations climate summit.

U.N. Secretary-General António Guterres opened a gathering of heads of state in Belem, Brazil, with harsh words for world powers who he said “remain captive to the fossil fuel interests, rather than protecting the public interest.”

Allowing global warming to exceed the key benchmark of 1.5°C, laid out in the Paris Agreement, would represent a “moral failure and deadly negligence,” Guterres said, warning that “even a temporary overshoot will have dramatic consequences ... every fraction of a degree higher means more hunger, displacement and loss.”

Brazil President Luiz Inácio Lula da Silva sought to mobilize funds from world powers to halt the ongoing destruction of tropical rainforests and advance the many unmet promises made at previous summits.

But reduced participation – with only half the heads of state in attendance as there were at last year’s summit – showcased global divisions and set a sombre tone. The leaders of the planet’s three biggest polluters, China, the United States and India, were completely absent from the preliminary gathering ahead of climate talks that begin next week at the Conference of Parties, known as COP30.

In a rousing speech, Lula warned that the “window of opportunity we have to act is rapidly closing and said there was “no greater symbol of the environmental cause” than the Amazon rainforest.

Known as the “lungs of the world” for its capacity to absorb vast quantities of carbon dioxide, a greenhouse gas that warms the planet, the biodiverse Amazon rainforest has been choked by wildfires and cleared by cattle ranching. Some 17 per cent of the Amazon’s forest cover has vanished in the past 50 years, swallowed up for farmland, logging and mining.

“It is only right that it is the turn of the Amazonian people to ask what the rest of the world is doing to prevent the collapse of their home,” Lula said.

Leaders spoke in Belem as the U.N. weather agency announced that 2025 was on track to be the second or third warmest year ever recorded. The concentration of greenhouse gases in the atmosphere, which hit a record high last year, continued to rise in 2025, as did ocean heat and sea levels, said the World Meteorological Organization reported on Thursday.

U.S. President Donald Trump, who calls climate change a hoax and withdrew the U.S. from the Paris climate accords the day he entered office, did not send any senior officials to Belem. Even U.S. lawmakers struggled to get to Brazil as U.S. airlines cancelled hundreds of flights due to the government shutdown.

There are concerns that the absence of the U.S. – which has at times played a key role in convincing China to restrain carbon emissions and securing finance for poor countries – could signal a broader rollback of climate politics.

“Extremist forces fabricate falsehoods to gain electoral advantage and trap future generations in an outdated model that perpetuates social and economic disparities and environmental degradation,” Lula said, without naming Trump.

President Gustavo Petro of Colombia, however, called out Trump directly, saying his absence was “100 per cent wrong.”

“Trump is against humankind,” said Petro, whose feud with his U.S. counterpart escalated in recent weeks as Trump accused him of being a drug kingpin and imposed financial sanctions on him and his family.

“We can see the collapse that can happen if the U.S. does not decarbonize its economy,” he said.

Chile’s left-wing President Gabriel Boric similarly singled out Trump, saying his claims that “the climate crisis does not exist ... is a lie.”

Indigenous groups also warned that Trump’s inaction could embolden other countries to ignore the crisis.

“It pushes governments further toward denial and deregulation,” said Nadino Kalapucha, the spokesperson for the Amazonian Kichwa Indigenous group in Ecuador. “That trickles down to us, to Ecuador, Peru, Argentina, where environmental protection is already under pressure.”

President Javier Milei of Argentina, who threatened to quit the Paris Agreement and last year pulled Argentine negotiators out the climate summit in Azerbaijan, also boycotted this week’s meeting.

That left leaders like U.K. Prime Minister Keir Starmer, German Chancellor Friedrich Merz and French President Emmanuel Macron to confront not only the consequences of an intensifying global climate crisis but a daunting set of political challenges a decade after the Paris Agreement promised a new era of global co-operation.

“Today, sadly, that consensus is gone, with some arguing that this isn’t the time to act and saying that tackling climate change can wait,” Starmer said in his address.

Some experts, though, saw a silver lining in the Trump administration’s absence, saying it reduced the risk of the U.S. foiling an ambitious agreement that requires a full consensus.

“Even if the U.S. plays an outsized role, it is one country and there are over 190 nations coming to COP, many of which are willing to stand up to the destructive tactics of the fossil fuel industry,” said Rachel Cleetus, senior policy director with the Climate and Energy program at the Union of Concerned Scientists.

Lula, who has presented himself as a champion of climate diplomacy in the Global South and won widespread praise for reducing deforestation in the Amazon, seeks to leverage Brazil’s moment on the world stage to push for action on curbing planet-warming emissions and helping poor nations adapt to the perils of climate change.

But Lula’s commitment has run into economic pressures.

He recently granted state oil firm Petrobras a license to explore oil near the mouth of the Amazon River, which environmental advocates say risks damaging oil spills. Lula has hit back at accusations of hypocrisy.

“I don’t want to be an environmental leader,” Lula said Tuesday. “I never claimed to be.”

Those tensions are at the heart of the conference and Lula’s centrepiece proposal – a new fund called the Tropical Forests Forever Facility that would pay 74 developing countries to keep their trees standing, using loans from wealthier nations and commercial investors.

The conference will test whether Brazil can drum up enough money to make its ambitions a reality. Existing U.N. funds for climate loss and damage have drawn only modest contributions.

Brazil’s government on Thursday announced US$5.5-billion in pledges to the fund from Norway, Indonesia and a few other countries. It remained unclear whether major world powers would follow suit.