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On December 19, 2023, the U.S. Department of State announced the geographic coordinates defining the outer limits of the U.S. continental shelf in areas beyond 200 nautical miles from the coast. For convenience, the United States—and also this Essay—refers to the portion of a country's continental shelf that is beyond 200 nautical miles from the coast as the "extended continental shelf," or ECS. The announcement states that the United States has ECS in seven different regions which collectively amounts to approximately a million square kilometers (about 380,000 square miles).

Abstract"Seldom has an apparent major change in international law been accomplished by peaceful means more rapidly and amidst more general acquiescence and approval," Lauterpacht observed of continental shelf claims nearly seventy years ago. When considered today, this observation merits a caveat, as the question of how far the continental shelf extends into the sea is not yet fully settled. This article explores the customary international law applicable for determining continental shelf limits and also examines the legal procedures used by states to gain international acceptance of those limits.

This article builds on Yohe's seminal piece on mitigative capacity, which elaborates 'determinants' of mitigative capacity, also reflected in the IPCC's third assessment report. We propose a revised definition, where mitigative capacity is a country's ability to reduce anthropogenic greenhouse gas emissions or enhance natural sinks. By ''ability'' we mean skills, competencies, fitness, and proficiencies that a country has attained which can contribute to GHG emissions mitigation. A conceptual framework is proposed, linking mitigative capacity to a country's sustainable development path, and grouping the factors influencing mitigative capacity into three main sets: economic factors, institutional ones, and technology. Both quantitative and qualitative analysis of factors is presented, showing how these factors vary across countries. We suggest that it is the interplay between the three economic factors—income, abatement cost and opportunity cost—that shape mitigative capacity. We find that income is an important economic factor influencing mitigative capacity, while abatement cost is important in turning mitigative capacity into actual mitigation. Technology is a critical mitigative capacity, including the ability to absorb existing climate-friendly technologies or to develop innovative ones. Institutional factors that promote mitigative capacity include the effectiveness of government regulation, clear market rules, a skilled work force and public awareness. We briefly investigate such as high abatement cost or lack of political willingness that prevent mitigative capacity from being translated into mitigation.

International audience ; This article builds on Yohe's seminal piece on mitigative capacity which elaborates 'determinants' of mitigative capacity, also reflected in the IPCC's third assessment report. We propose a revised definition, where mitigative capacity is a country's ability to reduce anthropogenic greenhouse gas emissions or enhance natural sinks. By "ability" we mean skills, competencies, fitness, and proficiencies that a country has attained which can contribute to GHG emissions mitigation. A conceptual framework is proposed, linking mitigative capacity to a country's sustainable development path, and grouping the factors influencing mitigative capacity into three main sets: economic factors, institutional ones, and technology. Both quantitative and qualitative analysis of factors is presented, showing how these factors vary across countries. We suggest that it is the interplay between the three economic factors - income, abatement cost and opportunity cost - that shape mitigative capacity. We find that income is an important economic factor influencing mitigative capacity, while abatement cost is important in turning mitigative capacity into actual mitigation. Technology is a critical mitigative capacity, including the ability to absorb existing climate friendly technologies or to develop innovative ones. Institutional factors that promote mitigative capacity include the effectiveness of government regulation, clear market rules, a skilled work force and public awareness. We briefly investigate such as high abatement cost or lack of political willingness, that prevent mitigative capacity from being translated into mitigation. ; Cet article s'intéresse aux déterminants de la capacité à atténuer le changement climatique. Ceux-ci ont été élaborés initialement dans un papier de Yohe puis dans le troisième rapport d'évaluation du GIEC. Après avoir revisité la définition de la capacité à atténuer le changement climatique, nous identifions trois groupes de facteurs influençant de façon croisée cette ...

International audience ; This article builds on Yohe's seminal piece on mitigative capacity which elaborates 'determinants' of mitigative capacity, also reflected in the IPCC's third assessment report. We propose a revised definition, where mitigative capacity is a country's ability to reduce anthropogenic greenhouse gas emissions or enhance natural sinks. By "ability" we mean skills, competencies, fitness, and proficiencies that a country has attained which can contribute to GHG emissions mitigation. A conceptual framework is proposed, linking mitigative capacity to a country's sustainable development path, and grouping the factors influencing mitigative capacity into three main sets: economic factors, institutional ones, and technology. Both quantitative and qualitative analysis of factors is presented, showing how these factors vary across countries. We suggest that it is the interplay between the three economic factors - income, abatement cost and opportunity cost - that shape mitigative capacity. We find that income is an important economic factor influencing mitigative capacity, while abatement cost is important in turning mitigative capacity into actual mitigation. Technology is a critical mitigative capacity, including the ability to absorb existing climate friendly technologies or to develop innovative ones. Institutional factors that promote mitigative capacity include the effectiveness of government regulation, clear market rules, a skilled work force and public awareness. We briefly investigate such as high abatement cost or lack of political willingness, that prevent mitigative capacity from being translated into mitigation. ; Cet article s'intéresse aux déterminants de la capacité à atténuer le changement climatique. Ceux-ci ont été élaborés initialement dans un papier de Yohe puis dans le troisième rapport d'évaluation du GIEC. Après avoir revisité la définition de la capacité à atténuer le changement climatique, nous identifions trois groupes de facteurs influençant de façon croisée cette capacité : des facteurs économiques, technologiques et institutionnels. Au niveau économique, ce sont à la fois le revenu, le coût de réduction des émissions et le coût d'opportunité lié aux réductions qui forgent la capacité d'atténuation. Du côté technologique, c'est la capacité à absorber ou à développer des technologies peu émettrices de gaz à effet de serre qui est déterminante. Enfin, au niveau institutionnel, l'efficacité de la régulation gouvernementale, la transparence des règles de marché, une main d'œuvre qualifiée et une sensibilisation de la population sont des éléments clés. Notre analyse est menée à la fois qualitativement et quantitativement. Elle permet de montrer comment les facteurs influençant la capacité d'atténuation varient d'un pays à l'autre