Book excerpt: Global awareness of environmental issues has resulted in the emergence of economically and environmentally friendly bio-based materials free from the traditional side effects of synthetics. This book delivers an overview of the advancements made in the development of biorenewable resources-based materials, including processing methods and potential applications in bio-based green composites. Covering various kinds of cellulosic biofibers, the text provides information on more eco-friendly and sustainable alternatives to synthetic polymers and discusses the present state and growing utility of green materials from natural resources.