Ten years after the Paris Agreement, COP30 in Belém —though quite eventful— has closed a chapter and opened another. The first Global Stocktake made clear the scale of the gap between political promises and the emissions cuts science demands. COP30 negotiated under that pressure, produced mixed outcomes, and left several decisive questions unresolved. This post evaluates progress during and after COP30 and considers likely futures for international climate law.
Evaluating progress during and after COP30
COP30 produced a bundle of decisions intended to advance finance, transparency and the Global Stocktake follow-up. The conference outcome documents show agreements on operational elements—finance roadmaps, workplans for the Global Stocktake follow-up, and procedural steps for finalizing the New Collective Quantified Goal (NCQG). Despite procedural progress, science-based assessments continue to show a large emissions gap. Current pledges still point to roughly 2.5–2.9 °C of warming by 2100 unless ambition and implementation increase significantly.
Belém’s outcome though ‘disappointing’ demonstrated diplomatic reality with mixed signals including the strengths—and limits—of multilateralism. Parties reached pragmatic compromises under intense political pressure, yet the final texts reflected deep divisions (notably around fossil fuels, finance architecture and the balance between mitigation, adaptation and loss & damage). Some commentators described COP30 as “divided but moving forward.”
COP30 further advanced discussions on the NCQG and parsed modalities for scaling up support by tripling adaptation finance by 2035. But negotiators left open how much public grant finance versus private leverage will count toward the goal. Analysts characterize COP30 outcomes as a compromise that increased political momentum and financial pledges in the short term but did not settle the NCQG’s final quantum or binding form.
The Future of International Climate Agreements
It is expected that the Paris architecture’s hybrid model would persist. This would be in the form of a legal scaffold of binding procedural obligations (NDC submission, transparency frameworks, Global Stocktake cycles), combined with politically binding—but legally soft—substantive pledges. Over time, specific elements may harden through complementary instruments such as: domestic legislation implementing NDCs; litigation invoking the ICJ opinion and domestic human-rights arguments; and negotiated protocols or decisions that add clearer expectations for finance and accountability. The ICJ’s July 2025 advisory opinion already provides normative heft that Parties and courts can draw on when interpreting states’ duties.
Climate finance will remain the axis of credibility. COP30 reinforced that finance—not just targets—will determine whether the Paris project sustains trust. The NCQG negotiations are the hinge: if the NCQG is framed and implemented mainly as private-sector leverage, developing countries will likely press harder for public grant finance and predictable flows. Thus, where it includes robust public commitments and clear tracking, it can restore some trust. SB62 and COP29 preparatory work already showed the technical complexity of getting NCQG modalities right. However, process alone does not equal progress. As procedural victories without immediate measurable increases in rapid, equitable finance and accelerated emissions cuts will translate into worsening climate impacts.
Litigation and advisory opinions will shape norms. With the ICJ advisory opinion clarifying obligations (precaution, cooperation, equity, and consideration of human rights), international law has new normative ammunition. Expect more strategic litigation and treaty-interpretation arguments that use the Paris architecture and the ICJ reasoning to push states and private actors toward stronger action. Such cases may not automatically solve the phasing out fossil fuels, financing or political problems, but they will change the bargaining landscape by raising the reputational and legal stakes of inaction.
Conclusion
It is now very clear that to leverage legal progress we must pair it with politics. The ICJ advisory opinion and growing climate litigation create legal pathways to accountability. But law alone won’t deliver finance or politically courageous phase-outs—diplomacy, domestic policy reform, and well-designed finance instruments must accompany legal pressure. COP30 was consequential: it sustained the multilateral process under intense strain, advanced technical work on finance and stocktake follow-up, and sharpened the political stakes heading into the next cycle. Yet the headline remains unchanged from the Global Stocktake: we are not yet on a 1.5°C pathway. The next decade will test whether the Paris Agreement’s hybrid architecture can be strengthened—through finance, law and politics—into a credible engine of equitable transformation.
Photo by Marri Smith
