Considering that the current model of world food system puts efficiency and profit first, many people still go hungry seriously pollute environment. In this paper, multiple nonlinear regression method is used to optimize existing system. Firstly, security evaluation established, global situation in recent years obtained by calculating FSSI. Then, influencing factors relationship between index v...

water shortages is one of the main factors inhibiting economic and social development and agriculture in most developing countries, especially in countries located in arid and semi-arid belt of the world. the study tried to investigate the affecting factors on water resources exploitation with considering water utilization pattern and an emphasis on sustainable water use in fars province. due t...