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In cities around the world, there is a general tendency to increase their size in the coming decades, which leads to an increase not only in population but also in the generation of urban environmental impacts, as well as the probability of becoming vulnerable areas due to the effects of climate change. In this sense, it is essential to increase their resilience, which will permit them to face the effects of climate change. A strategy that allows taking common measures of adaptation and mitigation approaches is the implementation of Nature-based Solutions. However, its level of success as a policy implemented in urban communities depends on a series of factors related to their level and time of adoption. This study proposes a methodology for evaluating these factors, through the creation of a participatory workshop and the potential use of a tool, initially developed for the agricultural sector, known as ADOPT, which could be used to evaluate the level of adoption and rate of diffusion of Nature-based Solutions. In order to test the adaptation of this tool, it was used for the case study of the city of Eindhoven in the Netherlands, which is one of the front-runner cities of the UNaLab project, sponsored by the European Commission, which gathers evidence of the level of effectiveness, implementation and replication of Nature-based Solutions in urban areas. For the case of Eindhoven, it was explicitly measured the level of adoption and rate of diffusionof green roofs with the participation of stakeholders from the academic and local government sectors. Giving as a result, scenarios of adoption of 12% and 49% respectively finding that a diverse participation of different stakeholders influences the perception of the potential adoption of this innovation in comparison with an individual answer.
