Taking Global Constitutionalism as an agora, a platform for international interdisciplinary discussions this article asks a question about the state we are in with regard to the international order as an order that is not just a ‘rule-based order’ but also more substantially, a ‘legal order’ based on the rule of law. The topic is illustrated with reference to examples of ‘contested compliance’ i.e. objections to implementing international law and/or international rulings by international actors on behalf of signatories of states parties of a treaty. Three questions guide this discussion. The first is a question of normative change: are we facing a change regarding United Nations member states’ respect for and handling of the rule of law, or is a larger change of international law itself imminent? The second is a question about the effects of the shift from ‘normal’ contestations of norms to ‘deep’ contestations of the international order itself. And the third is a question about pluralism and diversity: are the UN Charter Order’s institutions, conventions and organisations sufficiently equipped to respond to an ever more diverse range of internationally, transnationally, and sub-nationally raised justice-claims? The article elaborates on each of the three themes in light of the current situation of contested compliance with obligations under international law.

This article scrutinizes the role of transparency in the United Nations Framework Convention on Climate Change (UNFCCC). Specifically, it examines a widely heard claim that ‘transparency is the backbone of the Paris Agreement’, and the assumption that mandatory transparency (reporting and review) is essential to fill potential gaps in climate action left by voluntary, nationally determined climate targets. We subject this claim to critical scrutiny by tracing the political contestations around the desired role of transparency in the UNFCCC, with a focus on mitigation-related transparency. Our analysis shows that, despite developing countries expressing concerns during the pre-Paris negotiations, the Paris Agreement's enhanced transparency framework (ETF) is almost exclusively ‘enhanced’ (compared with earlier provisions) for developing countries, with some instances of regression for developed countries. Furthermore, the effects of such enhanced reporting are not straightforward and might de facto have an impact on countries’ autonomy to nationally determine their mitigation targets in diverse ways, even as all the detailed reporting does not facilitate comparability of effort. With implementation of the ETF due to start in 2024, our analysis provides a timely exploration of the extent to which transparency is really a backbone of the Paris Agreement, and for whom and with what implications for ambitious action from all under the international climate regime. It calls into question whether the transformative potential of transparency, much extolled within the UNFCCC process, will materialize for all countries in a similar manner or rather will have an impact on countries differentially.

Climate change stands as the paramount challenge confronting humanity in the contemporary era. Attempting to address the problem, the main sectors responsible for it have been subject to domestic or international policies and laws aimed at reducing greenhouse gas (GHG) emissions, except one: livestock. Given that animal-sourced food production contributes a large portion of GHG emissions, this Article aims to analyze the impacts that the exclusion of the livestock sector, in efforts to tackle climate change, would have on compliance with international treaties on the subject, especially the Paris Agreement. One conclusion reveals that state parties, by ignoring the sector, will violate several articles of the Agreement, which will likely lead to the failure of its main purpose of holding the increase in the global average temperature to well below 2°C.

Carbon leakage – the increase of greenhouse gas emissions in foreign jurisdictions following the introduction of domestic or regional climate mitigation measures – raises key questions in the climate change debate. This includes whether carbon leakage constitutes a threat to the environmental integrity of climate policies and, if so, how this could be mitigated. Through the use of four hypothetical models of international climate change regime, this article argues that international climate change law is a key factor in answering this two-part question. Firstly, the article demonstrates that the architecture of international climate change law affects whether carbon leakage can be considered as undermining the mitigation objective of climate policies. Secondly, it draws attention to the interaction – and potential tension – between carbon leakage prevention measures and international climate change law.

The relationship between armed conflict, the environment and climate change is intricate and challenging to define. While international humanitarian law (IHL) includes some environmental protections, it did not anticipate the connection to climate change. Climate change can act as a risk multiplier, intensifying negative socio-economic impacts, and conflict-related environmental damage may contribute to climate change. Bridging these fields is crucial, and to this end, this article seeks to interpret IHL considering evolving understandings of armed conflict effects and progress under international environmental law (IEL). The article illustrates how existing norms can address climate change impacts in warfare, and explores how relevant IEL provisions, such as the Paris Agreement and the harm prevention principle, could be applied during armed conflicts to achieve similar goals.

The Parties to the Paris Agreement have committed to communicate successive ‘nationally determined contributions’ (NDCs) to the global response to climate change. Each NDC is expected to reflect the Party's ‘highest possible ambition’ (HPA) on the mitigation of climate change. This article envisages the possibility of taking HPA seriously: that is, of approaching it as an effective legal standard. It shows that, in some circumstances, the HPA standard can help to assess whether a State has complied with due diligence obligations on climate change mitigation.

The global climate crisis response envisioned by the Paris Agreement is commonly understood as demanding transformative change. International law, however, lacks a holistic conceptual framing for making sense of what such change would entail, how it might unfold, and who and what it will involve. Moreover, there has been little critical engagement with the question of what is at stake when invoking the notion of transformation. Contributing to the broader debate about what the climate crisis demands of international law, this article offers a critical conceptual appraisal of the notion of ‘transformation’. Conceptually, it describes transformative dynamics as processes which work towards radically different states of affairs that seem practically impossible under the status quo, but which could arguably be realized if different conditions were in place. Developing an ontology of transformative change, the article identifies heterogenous temporality, the actualization of impossible possibilities, and distributed engagement as three central features of transformations in climate crisis. Having laid the conceptual groundwork, the article then takes a critical turn and foregrounds unresolved tensions that run through transformation thinking. The aim here is to connect to critical discourses and show how these tensions can serve as entry points for international law to meaningfully engage with the notion of transformation. The article closes by offering some reflections on what engagement with the notion of transformation might mean for international law’s disciplinary identity, rationale, and sense of purpose.

While many investor-state dispute settlement (ISDS) proceedings based on international investment agreements have dealt, directly or incidentally, with environmental issues, state measures relating to the mitigation and adaptation to climate change have been subject to a small number of reported cases. This article demonstrates that there is a significant gap between the number of investor-state disputes having a direct relevance with climate change, on the one hand, and the number of such cases that have actually raised climate change as a material legal or factual issue. In addition, arbitral tribunals faced with disputes related to measures or sectors that are of direct relevance to climate action have, to date, virtually never engaged in any sort of substantial analysis of international climate change treaties and related instruments, rules, or practices. Against this backdrop, this article will explore ways for arbitrators and parties to ISDS proceedings to better consider the climate regime — in particular, the Paris Agreement and instruments arising therefrom — in ISDS proceedings beyond its current limited role as an element of context. While the literature has mostly focused on integrating climate change concerns in ISDS, this article goes further by exploring how states’ international climate obligations could play a greater role in the adjudication of investor-state disputes, including by providing states with a justification for implementing more ambitious regulations as well as tribunals with guidance for interpreting substantive obligations in investment treaties.