Addressing the global challenges of climate change, food security, and poverty alleviation requires enhancing the adaptive capacity and mitigation potential of agricultural landscapes across the tropics. However, adaptation and mitigation activities tend to be approached separately due to a variety of technical, political, financial, and socioeconomic constraints. Here, we demonstrate that many tropical agricultural systems can provide both mitigation and adaptation benefits if they are designed and managed appropriately and if the larger landscape context is considered. Many of the activities needed for adaptation and mitigation in tropical agricultural landscapes are the same needed for sustainable agriculture more generally, but thinking at the landscape scale opens a new dimension for achieving synergies. Intentional integration of adaptation and mitigation activities in agricultural landscapes offers significant benefits that go beyond the scope of climate change to food security, biodiversity conservation, and poverty alleviation. However, achieving these objectives will require transformative changes in current policies, institutional arrangements, and funding mechanisms to foster broad-scale adoption of climate-smart approaches in agricultural landscapes.

Background: For agricultural systems to achieve climate-smart objectives, including improved food security and rural livelihoods as well as climate change adaptation and mitigation, they often need to be take a landscape approach; they must become 'climate-smart landscapes'. Climate-smart landscapes operate on the principles of integrated landscape management, while explicitly incorporating adaptation and mitigation into their management objectives.

Background: Smallholders have begun to take advantage of a growing pool of investment in climate change mitigation. Meanwhile, early movers in this area are working to develop innovative models that will allow projects to be financially sustainable and scalable while benefiting local actors. This study focuses on two of these projects in East Africa, managed by Vi Agroforestry in Kenya and ECOTRUST in Uganda. They engaged in a participatory action research process to identify ways that local actors could take on expanded roles within the projects.Results: Results are presented as case studies which include project context, roles of local project actors, actions selected, and the outcomes of the actions on the key actors targeted. The actions focused on building the capacities of community-based intermediaries, facilitating partnerships with local government and local non-governmental organizations, and supporting a more active role played by women. Key findings from this process were that community-based intermediaries can play a leading role in land management trainings; local government involvement is critical to project success; local non-governmental organizations and businesses can play central roles in training and providing market incentives to farmers to implement sustainable practices; and women's roles in projects can grow if project benefits are aligned with their needs and trainings are made more accessible.Conclusions: These cases demonstrate that there is substantial scope for the responsibilities within agricultural carbon projects, and by extension climate-smart agriculture initiatives more broadly, to be institutionalized at the local level. However, regardless of the institutional setup, due to carbon market factors beyond the control of these projects, the financial case for smallholder projects that rely solely on financing from carbon credits remains challenging to these projects and others like them. As programmatic and policy-led approaches grow from these project models, it may be easier to find ways to integrate carbon financing with support for climate change adaptation, rural development, and ecosystem services provision. With these new models, the ability to institutionalize management and implementation capacity at the local level will remain critically important.

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