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Margaretha Wewerinke-Singh is an assistant professor of public international law at the Grotius Centre for International Legal Studies at Leiden University. Her research addresses the role of law in confronting sustainable development challenges, with a focus on climate change and human rights. Before joining Leiden University, she was a senior lecturer in environmental law at the University of the South Pacific (USP) School of Law in Port Vila, Vanuatu, where she coordinated USP’s environmental law program.Ìý

She is the editor ofÌýEnvironmental Law andÌýGovernanceÌýin the Pacific: Climate Change, Biodiversity and Communities,ÌýwhichÌýnavigates the majorÌýenvironmental law andÌýgovernance challenges of the present andÌýfuture of the Pacific.ÌýHer otherÌýbook,ÌýState Responsibility, Climate Change and Human Rights under International Law, explains when and where state action related to climate change may amount to a violation of human rights.ÌýShe has numerous book chapters and peer-reviewed articles in international law and interdisciplinary journals. In 2018 she received an NWO Veni-grant for her project "Climate Justice through the Courts," which uses socio-legal research to investigate the effectiveness and potential drawbacks of rights-based climate litigation. She remains affiliated with USP as an adjunct senior lecturer in environmental law at the Pacific Centre for Environment and Sustainable Development.

Wewerinke-Singh’s research builds on more than 15 years of involvement in legal processes related to sustainable development and human rights. She has acted as a legal adviser to governments at international climate change negotiations, represented nongovernmental organizations at the UN Human Rights Council and advised the African Commission on Human and Peoples’ Rights and the Office of the UN High Commissioner for Human Rights on the nexus between climate change and human rights.Ìý

She leads the global team assisting the Republic of Vanuatu in its pursuit of an advisory opinion on climate change from the International Court of Justice and serves on the Committee of Legal Experts of the Commission of Small Island States on Climate Change and International Law, which is mandated to promote and contribute to the definition, implementation and progressive development of rules and principles of international law pertaining to climate change. She also leads the IUCN WCEL Climate Change Specialist Group projectÌýJudicial Handbook on Climate Litigation, which identifies emerging best practice in the adjudication of climate change. She is an attorney atÌýBlue Ocean Law,Ìýa boutique international law firm based in Guam; the deputy regional director for Europe of the Global Network on Human Rights and the Environment; and a member of the editorial board of the Asia Pacific Journal of Environmental Law and the scientific advisory board of the European Journal of International Law.