Nations Unite to Tackle Climate Disinformation at ‘COP of Truth’

The surge in climate disinformation has prompted world leaders at the COP30 summit in Belém to take unprecedented action, with twelve nations including Brazil, France, Canada, and Germany signing the first formal global commitment to combat false climate narratives.

The Declaration on Information Integrity on Climate Change, adopted on the third day of the summit, represents a milestone in the fight against climate denialism. It calls for coordinated action from governments, media organizations, academic institutions, and the private sector to promote accurate environmental information while curbing misleading claims about the climate crisis.

“This is the COP of Truth,” declared Brazilian President Luiz Inácio Lula da Silva in his opening address, urging global leaders to “defeat climate denialism” and warning that “obscurantists reject scientific evidence and attack institutions.” UN Secretary-General António Guterres reinforced this message, emphasizing the need to “fight mis- and disinformation, online harassment and greenwashing.”

The declaration comes at a critical moment, with recent data from the Coalition Against Climate Disinformation and the Observatory for Information Integrity revealing a 267 percent increase in COP-related disinformation between July and September. Charlotte Scaddan, senior adviser at UN Global Communications, described this trend as “deeply concerning,” noting that fossil-fuel interests, political actors, and online content creators were “monetising outrage and lies.”

Climate misinformation poses dangers beyond political discourse. Dr. Melissa Lem, president of the Canadian Association of Physicians for the Environment, highlighted the public health implications, noting that during extreme weather events like wildfires and floods, “false information spreads faster than facts, leaving people unable to protect themselves.”

The declaration serves as the flagship policy of the Global Initiative for Information Integrity on Climate Change, a partnership established at last year’s G20 summit in Rio between Brazil, the United Nations, and UNESCO. Under the new agreement, governments have committed to funding research on information integrity and strengthening support for developing countries through a newly established Global Fund.

Civil society has rallied behind the initiative, with more than 400 organizations and prominent climate leaders signing an open letter urging governments to address what they describe as a “multi-faceted global emergency” – the “pollution of the information ecosystem.” Signatories include Paris Agreement architects Christiana Figueres and Laurence Tubiana.

Meanwhile, other developments at COP30 have underscored the scale of the challenge. A report revealed that over 1,600 fossil-fuel lobbyists are attending the summit, outnumbering every national delegation except the host country’s. This has intensified concerns about corporate influence over climate negotiations.

In a separate but related commitment, Canada announced its continued support for Indigenous climate leadership and pledged backing for both the Tropical Forest Forever Facility and the information-integrity initiative, signaling a broader shift toward addressing issues of climate justice, governance, and public trust.

The International Energy Agency provided a note of optimism with the release of its 2025 World Energy Outlook, which projects that more renewable energy capacity will be built between now and 2030 than in the previous four decades combined. However, an Amnesty International report offered a sobering counterpoint, revealing that a quarter of the global population—more than two billion people—lives within five kilometers of fossil-fuel operations, placing them at significant risk.

As the summit continues, the local harbor in Belém has witnessed a powerful display of grassroots climate activism, with a flotilla of over 100 boats carrying 5,000 Indigenous activists and forest defenders marking the beginning of the parallel People’s Summit, a civil society gathering running alongside the official negotiations.

The message emerging from Belém is unambiguous: disinformation is no longer viewed as peripheral to climate action but as a fundamental obstacle that the international community must confront head-on. Brazil’s leadership on this issue signals a new phase in climate diplomacy, one that recognizes the integrity of information as essential to meaningful environmental progress.