In order to preserve this world for future generations, we must strive for sustainable development aEURO" a development that meets the needs of the present generation without compromising options and resources for future generations to meet their own needs. However, some scientists suspect that recent large floods, heat waves and drought in Central Europe and the Down Danubian region are indicators of more severe hazardous events in the future. Increased pollution in the atmosphere is causing gradual increase of the temperature. The environment is becoming increasingly endangered, especially as humans encroach on and modify fragile environments. Based on papers presented at the 9th International Symposium on Interdisciplinary Regional Research (ISIRR 2007) ON 21aEURO"22 June 2007 in Novi Sad (Serbia), this book covers, for the first time, the complex field of technological, agricultural and developmental horizons in natural resources, medical problems, ecological modeling, and relations of humanity issues and society in the Down Danubian region.