This chapter considers public health impacts of climate change in developing countries and responsive interventions, with a focus on the United Nations Framework Convention on Climate Change(UNFCCC) governance frameworks, the World Health Organization (WHO), and its membership. Its scope encompasses the roles and mandates of international organizations and instruments relevant to climate change-related policy. It discusses the status of health in international climate law – particularly the UNFCCC, the Paris Climate Agreement, and related institutional decisions – and these instruments’ implications for the prioritization of health in climate policy at the international and domestic levels. It then discusses the role of WHO policies to implement health requirements, especially in relation to the Paris Climate Agreement. The chapter concludes by proposing options to improve the status quo through adaptive governance at both the international and domestic levels and argues for several substantive, institutional, and procedural mechanisms of international climate law to promote and protect public health in developing countries.