The symposium is multidisciplinary and combines the following vital concerns: How will the current and future climate affect global food security (GFS)? How will the increasing population respond to food supply and demands? When and how much will natural and anthropogenic global changes limit agricultural production, especially excessive water use? What contribution must an observational system provide, including satellite data, to monitor and predict environmental changes? How does interaction between agricultural technology and climate limit crop production? Do the climate and Earth changes provide enough time for agriculture to be adapted? A few leading scientists will address these issues.