To date, the earth planet can longer withstand the resultant pressure from the interaction between human beings and the Environment. The consequences of the interactions such as deforestation and overuse of fossil fuels have resulted into climatic changes like global warming, acid rain formation, & pollution of water sources. These effects are not only catastrophic to the current and the future generations, but also lead to extinction of some species. The current global population estimated at 6.9 billion uses the equivalent of 1.4 earth planets to provide resources & absorb the wastes produced. UN projections by 2010 put global population at 9.5 billion. This necessitates two earth planets to meet the earth bio-capacity. The greatest challenge to the world leaders & health professionals is how to embark on proper means of sustainable development in order to correct the current global ecological overshoot. This book empowers the new generation of Public Health professionals and scholars especially in developing countries by examining the underlying issues to the local and global environmental challenges and suggesting ways of making a difference in humanity life and environment.