COP30 Day 3: Nations Pledge to Combat Climate Misinformation as Pacific Islands Receive Legal Support

Ten nations have joined forces to combat climate misinformation in a landmark declaration aimed at strengthening global action against the climate crisis. Brazil, Canada, Chile, Denmark, Finland, France, Germany, Spain, Sweden, and Uruguay signed the commitment on November 12 during the third day of COP30, recognizing that “threats to information integrity” represent a significant barrier to climate progress.

The declaration emphasizes the need to ensure equitable access to accurate, evidence-based climate information worldwide. Signatories pledged to cooperate on capacity building initiatives to counter the growing spread of climate misinformation, including outright climate change denial and deliberate attacks on environmental journalists and scientists.

“We live in an era in which obscurantists reject scientific evidence and attack institutions. It is time to deliver yet another defeat to denialism,” said Brazil’s President Luiz Inácio Lula da Silva in a statement following the signing. “Climate change is no longer a threat of the future; it is a tragedy of the present.”

The ten-nation agreement specifically acknowledges how misinformation undermines public debate and erodes trust in institutions, hampering collective efforts to address climate challenges. This coordinated approach represents one of the first formal international agreements focused specifically on combating climate misinformation.

The timing of this declaration comes as climate denial and misleading information continue to proliferate across social media platforms and certain news outlets, creating confusion among the public and potentially delaying crucial climate policies. Experts have increasingly warned that targeted misinformation campaigns, often funded by fossil fuel interests, have significantly impacted public perception and political will to address the crisis.

In a separate but equally significant development at COP30, Pacific Island nations received important legal backing in their fight against rising sea levels. These nations, which face existential threats from climate change despite contributing minimally to global emissions, have gained new leverage following a landmark advisory opinion from the International Court of Justice (ICJ) in July 2025.

The ICJ ruling established that climate action is not merely an aspirational goal but a legal obligation under international law. This represents a pivotal shift in how climate commitments are viewed globally. The court rejected narrow interpretations that only specific treaties like the Paris Agreement govern climate action, instead outlining a broader legal framework based on human rights law, maritime law, environmental treaties, and customary international law.

For vulnerable island nations, this opinion transforms climate diplomacy from primarily moral persuasion to a matter of legal accountability. It provides these countries with stronger grounds to demand concrete action from major greenhouse gas emitters.

The convergence of these developments at COP30 highlights how the global approach to climate change is evolving on multiple fronts – addressing not only the physical challenges of climate change but also the information landscape that shapes public and political responses.

Climate experts note that misinformation has been particularly damaging in delaying meaningful action, as it creates artificial debates about settled science and undermines public support for necessary policies. The ten-nation declaration represents an acknowledgment that addressing the climate crisis requires not only technological and policy solutions but also protecting the integrity of climate information.

As COP30 continues, these initiatives underscore a growing recognition that combating climate change requires multifaceted approaches that address both the physical realities of a warming planet and the social, political, and informational barriers to effective action.