This book discusses new developments in an up-to-date, coherent and objective set of chapters by eminent researchers in the area of polypropylene-based biocomposites and bionanocomposites. It covers, biomaterials such as cellulose, chitin, starch, soy protein, hemicelluloses, polylactic acid and polyhydroxyalkanoates. Other important topics such as hybrid biocomposites and bionanocomposites of polypropylene, biodegradation study of polypropylene-based biocomposites and bionanocomposites, polypropylene-based bionanocomposites for packaging applications, polypropylene-based carbon nanomaterials reinforced nanocomposites, degradation and flame retardency of polypropylene-based composites and nanocomposites, are covered as well.