Acknowledging the crucial role that these areas play in carbon sequestration, greenhouse gas reduction, and flood prevention, Wetland4Change promotes the development and testing of two case studies: one on CO2 storage, namely how to measure the efficiency of ponds and lagoons in terms of Carbon Sequestration, and the other on flood risk prevention, namely what measures through wetlands can mitigate the risk due to the effects of climate change. The measurement and monitoring tests of the two case studies will occur in 5 pilot sites located in Bulgaria, Greece, France, Spain, and Italy. MEDSEA will thus take care of the experimentation at the pilot site in the Oristano area and coordinate international communication, as well as contribute support on multiple fronts: from the training of stakeholders and political decision-makers to the dissemination of results. But also, and above all, on the environmental education of wetland areas: why are these areas today considered as the best natural solution to climate change? And, again: what are the expected and more frequent extreme events due to climate changes for which wetlands can be the most effective natural barrier?