It is predicted that crop grain yields are very sensitive to changes in CO 2 , temperature, and nitrogen (N) fertilizer amounts [5][6][7]. For instance, [8] found that the wheat yield reduction (36 to 40%) than maize in the mid of the century (2021-2050).Similarly, [9] found that elevated temperature will reduce the total wheat production at a rate of 0.3928 Mt yr -1 during the period 1980-2016. Whereas, elevated CO 2 levels, water availability through irrigation, and nitrogen fertilizers have led to an increase in annual wheat production at 0.67, 0.25, and 0.26 Mt yr -1 , respectively, averaged over the period 1980-2016 in the case of India [9]. A strong increase in vulnerability is noted over time in the eastern and southern parts of Ethiopia [10]. The vulnerability analysis done for East Hararghe, Ethiopia, also revealed that more households are to be food insecure in the future than present [11].