The issue of agricultural sustainability remaining a topical concern. While agriculture being an important sector for the development of world economies. It has noted that implementing farming sustainably for a better contribution in the next generation economic development needed. The main purpose of this paper is to analyze the economic sustainability of the rice farms and market gardening benefiting from the FAFA MC project in the Southwest juxtaposed departments in Benin. Specifically, it is first of all a question of assessing, with regard to the two types of farms, which type of farming is the most sustainable. Next, to see whether rice farms are more sustainable than market gardening farms; and finally, to highlight the relationship between economic sustainability and environmental and social sustainability. The data used where obtained from FAFA MC database (2012). Finally, a data of 48 farms were used in the analysis. The analysis techniques have consisted of three steps these are: descriptive analysis, the principal component analysis applied and an ascending hierarchical classification applied. The analysis of data supported by SPSS 2.0, Excel 2013 and SPAD 5.5 software package. To understand the economic sustainability of the farms, the sustainability indicators methodology of IDEA was employed. Overall, it emerges from the analysis of results that the farms considered have limited economic sustainability (a score of 38.25 / 100); group farms prove to be more economically sustainable than individual farms and vegetable farms are more economically sustainable compared to rice farms. So, it seems important to encourage groupings of individual farmers, to clearly define property rights on agricultural land, to sensitize producers to the application of the principles of sustainable development.

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The purpose of this paper is to analyse the determinants of the decision to relocate households in the context of air pollution in Cotonou. The study used the database produced in 2010 by the "Centre for Studies, Training and Research in Development" of the University of Abomey-Calavi in Benin, as parting of an assessment of the health effects of air pollution in Cotonou. A logit model of relocation decision was estimated using a sample of 584 households. The results showed that monthly average income, health expenditure, health status and secondary and higher education levels positively influenced the household's decision to relocate. Moreover, it appears necessary to reduce health expenditure whilst improving the health status of the population, without neglecting the improvement of income levels; as well as the strengthening of secondary and higher education. Thus, taking into account the effects of air pollution in policies is still relevant to achieve sustainable development.