Systems analysis for sustainability is an emerging discipline where technologies, processes or policies are evaluated comprehensively for sustainability. Trifold sustainability metrics such as technical feasibility, economic viability and environmental impacts are commonly used to assess sustainability. In addition to these metrics, it is important to consider resource sustainability, policies and social aspects for evaluating the sustainability of any proposed alternative. Green-Economy: Systems Analysis for Sustainability provides a theoretical background to perform such analyses and detailed case studies. The first part of this book introduces methods and tools to perform technical feasibility analysis, economic viability analysis, environmental impacts assessment, environmental risk assessment, resource sustainability assessment, policy and social aspects of technologies, general logic-based sustainability assessment for green products and introduces resilience thinking. The second part of the book focuses on case studies with an emphasis on solar energy, biofuels and bioproducts from across the globe.