Book excerpt: Comprising a collection of papers from the 4th International Conference on Environmental and Economic Impact on Sustainable Development, the research studies included in this book consider the impact of economic constraints on the environment, taking into account the social aspects as well as the over-use of natural resources. The papers examine issues related to whether some forms of development are compatible with environmental protection, particularly in cases of possible serious contamination and toxicity. Uncontrolled development can result in damage to the environment in terms of the release of toxic substances and hazardous waste. Addressing problems of great importance, this book examines more constructive and progressive approaches to ensure sustainability. A major motivation is to learn from past failure, to avoid repeating similar mistakes, while attempting to prevent emerging threats to environmental and ecological systems. Fundamental to these concepts are the analysis of the inherent risk and the development of appropriate strategies.