[en] In order to strengthen the action of non-state actors and give credibility to climate stabilisation scenarios, the Climate Chance Association launched in 2018 a Global Observatory of Non-State Climate Action, which aims to explain the evolution of greenhouse gas emissions, by crossing national public policies, sectoral dynamics, the implementation of the commitments and the non-state actors' best practices at the local level. First-of-its-kind, published in French and English, this report will provide decision-makers, journalists, researchers, students and newcomers with a detailed framework for understanding major program areas and a first level of information and action analysis, particularly at the local level, in order to achieve the Paris Agreement and the Sustainable Development Goals. In Book 2 on 'The Mobilisation of local and subnational governments', Section 1 we have synthesised the elements of evaluation and assessment of the main local and subnational networks engaged in fighting climate change. This synthesis, based on their annual communications, their online portal, and our mutual exchanges, allows us to understand the recent trends of the implemented projects and the state of reporting on climate action of local authorities across the world. Section 2 illustrates this first synthesis using 23 study cases of cities and regions which have succeeded in implementing public policies. This series of case studies has been chosen based on the recent activity of local and subnational governments, including the publication of local climate action plans, generally related to the initiatives described in the first section. For each of these cases, thematic axes are put forward. Finally, Section 3 offers a global overview of local public policies recently implemented through 80 short illustrations from a constant news watch, and for many, from the contributions of the project holders themselves made within The Cartography of Action.