BELEM, Brazil — World leaders gathered this week for the COP30 United Nations climate summit in Brazil’s Amazon gateway city, but a string of high-profile absences — including that of United States President Donald Trump — has raised urgent questions about whether the annual conference retains the political leverage needed to drive meaningful emissions reductions. The summit opened Monday amid tropical heat and protests along the riverfront, with delegates from more than 170 countries in attendance but conspicuously fewer heads of government than organizers had hoped.
Trump, who withdrew the United States from the Paris Agreement earlier this year, declined an invitation to Belem, a decision that analysts say strips the conference of significant symbolic and practical weight. China’s President Xi Jinping also opted to send a senior envoy rather than attend in person, as did the leaders of India, Russia, and several Gulf oil-exporting states. In total, fewer than 60 heads of state or government were confirmed for the opening plenary, compared with more than 120 at COP26 in Glasgow four years ago.
Despite the absences, the Brazilian host government has insisted the summit retains critical momentum. Brazil’s President Luiz Inacio Lula da Silva, one of the summit’s most visible champions, delivered an opening address calling the conference “a last clear chance” for the international community to lock in commitments that keep global average temperature rise below 1.5 degrees Celsius above pre-industrial levels. Brazilian officials say more than 60,000 delegates, observers, and civil society representatives have registered, making it one of the largest COPs on record in terms of total attendance.
Climate scientists and policy experts offered measured assessments of what the summit could still achieve. Dr. Mara Quintero, a climate policy researcher at the International Environment Institute in Geneva, said the absence of major emitters from the top table does not necessarily doom the negotiations. “COPs are not just about the photo opportunity with world leaders,” she said. “The substantive work happens in technical working groups and bilateral deals, and those can proceed with or without a president in the room.” Others were less sanguine. Henrik Sorensen, a former lead negotiator for the Nordic bloc, warned that without the direct political authority of heads of government, ministers may lack the mandate to accept difficult compromises on financing and fossil fuel phase-out language.
The conference’s formal agenda centers on finalizing the New Collective Quantified Goal on climate finance — a successor to the $100 billion annual pledge that wealthy nations have struggled to meet consistently — as well as pushing forward the global stocktake process initiated under the Paris Agreement. Developing nations, led by a coalition of small island states and African economies, are demanding a finance goal of at least $1.3 trillion per year by 2035, citing accelerating damage from floods, droughts, and sea-level rise. Wealthier nations have countered with figures in the $300 billion to $500 billion range, setting up a protracted negotiation that diplomats say could extend well past the summit’s scheduled November 21 close.
The role of major emerging economies has become a focal point of early negotiations. Officials from Brazil, South Africa, and Indonesia have jointly tabled language that would require industrialized nations to publish binding decarbonization roadmaps by 2027, a proposal that European Union negotiators said they could accept in principle but that has met resistance from delegations tied to fossil fuel export revenues. The debate reflects a deepening north-south fracture over who bears primary financial responsibility for the energy transition, a question the Paris Agreement left largely unresolved and that COP30 is under particular pressure to address.
Civil society groups have responded to the leadership vacuum by amplifying grassroots pressure. Tens of thousands of activists marched through central Belem on Sunday in what organizers described as the largest climate demonstration ever held in South America, with protesters carrying banners that read “Empty Chairs, Burning Earth” in Portuguese, English, and Spanish. Indigenous leaders from across the Amazon basin held a parallel forum at a riverside community center, issuing a declaration that called on signatories to recognize land rights as a prerequisite for effective forest protection. Whether the political energy generated outside the conference halls will translate into stronger text inside remains the defining question of COP30’s opening days, with a preliminary draft agreement expected to circulate among delegations no later than Friday.