Chapter 16 on Causation explores the challenges of proving causation in an interconnected system like the climate, where multiple actors contribute to the overall impacts. The authors highlight the significance of probabilistic approaches, recognising that establishing direct causation can be challenging due to the nature of climate change and the cumulative nature of greenhouse gas emissions. In their exploration of emerging best practices, the authors underscore the growing recognition among courts of the need for nuanced interpretations of causation requirements in climate litigation. They highlight innovative judicial strategies that utilise scientific evidence and expert testimony to assess the contribution of specific actors to climate impacts, even in the absence of direct causation. They emphasise the importance of interdisciplinary collaboration between legal and scientific experts to navigate the complexities of causation in climate cases. By incorporating and further developing these emerging best practices, courts can facilitate an accurate and fair distribution of responsibilities through the cases they adjudicate.

Chapter 7 dissects how human rights laws have been harnessed in climate cases, scrutinising key judgments that have applied human rights frameworks to climate change and the implications of these legal strategies for both claimants and defendants. The authors’ analysis of emerging best practice reveals a growing acceptance of the notion that a State’s failure to take adequate action to address climate change constitutes a breach of human rights obligations, and this recognition is shaping legal strategies in climate litigation at the national and international levels. The authors also highlight how recent jurisprudence further suggests that corporations have important obligations to respect human rights in the face of climate change. Although jurisdictional disparities exist, the growing body of case law demonstrates the adaptability and replicability of rights-based reasoning, thereby contributing to the establishment of a consistent and coherent framework for ‘transnational’ climate law.