This book emphasizes the latest advancements in green composites, with a focus on incorporating micro and nano-sized particles into sustainable polymers. The escalating global energy demands and the depletion of fossil fuels are compelling scientists worldwide to explore “green materials” derived from natural resources. While synthetic materials cannot be entirely replaced, researchers are exerting significant efforts to minimize hazardous materials by utilizing sustainable polymers. Further studies are necessary to optimize the efficiency of green polymers reinforced with micro and nanomaterials. This book highlights the diverse applications of sustainable composites. It benefits academics, industrialists, and researchers, offering insights into reducing the environmental impact caused by synthetic composites through green composites. Additionally, this book discusses necessary steps for the commercialization of sustainable polymer composites. While numerous books address green composites, there is a gap in the market regarding the commercialization aspects and measures taken to reduce carbon footprints, this book addresses that gap.