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\section{Conclusion}  In the light of expected future population growth and the growing scarcity of arable land more due to climate change and variability, increasing  pressure on the African food system systems  is to be expected to and the necessity  provide more food on less land. For most of the countries in Sub-Saharan Africa this implies a huge task. Agroforestry has been This paper  introduced agroforestry  as a promising adaptation strategy. strategy for substistence farmers.  By various  cost-effective means methods  of planting trees, smallholder farmers can increase the resilience of their food crops, whilst simoultaneously generate additional income from the sale of firewood and other products and provide CO2 contribute to CO\textsubscript{2}  emission mitigation through carbon sequestration. Despite this synergy between increasing food security and climate change mitigation, the adoption rate of agroforestry in Sub-Saharan Africa is still unsatisfactory.  Despite its potential It is therefore important to provide a better understanding on  the adoption rate barriers and reasons that hinder smallholder farmers to adopt agroforestry methods on their cultivated lands. This paper reviewed the approaches taken by different recent studies on the evaluation  of intrinsic and extrinsic factors that influence farmers' attitudes, knowledge and perception and thus their decision-making process. We proposed a first approach for a quantification of extrinsic factors based on approximate indicators that can be evaluated using publicly available statistical data. Thereby we were able to identify a set of countries with a large adoption potential for  agroforestry in Sub-Saharan Africa is still unsatisfactory. and a low potential, respectively.  Synergy between food security and %He also explained the future risks of  climate change mitigation in areas such as human security, livelihoods and human health, and the implications on sustainable development.  He also explained the future risks of %Pachauri highlighted on  climate change in areas such as human security, livelihoods and human health, adaptation  and the implications impact of mitigation  on sustainable development. economic growth. He noted that there are strategies that can help manage disaster risk today and also help improve people’s  %livelihood and well-being.  Pachauri highlighted on climate change adaptation and the impact We hope to having achieved a contribution towards a comprehensive understanding  of mitigation on economic growth. He noted that there are strategies that can help manage disaster risk today and also help improve people’s  livelihood and well-being.  “Effective agroforestry as an effective  risk management and adaptation are technology that is  tailored to local and regional needs and circumstances. Governing Yet, in order to improve human security and livelihoods of the people, it also requires policy-makers to govern  a transition towards an effective climate response and sustainable development pathway is a that openely acknowledges the  challenge involving of sustainable development that involves  rethinking our relation to nature,” Pachauri stressed.  http://www.gulf-times.com/qatar/178/details/395490/climate-change-poses-risk-to-sustainable-development%3A-expert nature \cite{gulftimes}