In recent decades, the focus on the green composite speedily increases because they are low toxic, cheap, and available. A combination of naturally sourced polymetric polymer, suitable filler and excellent wettability and good filler/matrix interaction, synthesized with advance method and techniques appropriate to develop biocomposite with improved properties for different applications in marine, railway, construction and automobile industries. Although several naturally sourced material has been combined to achieve this aim, they're much agricultural waste that is underutilized. Nanocomposite shows acceptance for applications in different fields because the loading of small particles often of extensive surface material with captivating properties. It offers new technology and attracted opportunities for several sectors, such as MassTransit, automotive, aerospace, biotechnology, and nanotechnology industries. The combination nanofiller in natural fiber-filled composite enhances properties through the synergistic effect between the fiber and filler. This review provides information about various classes of natural fibers, nanofiller, based composite, nanocomposite, and natural fiber/nanofiller-based hybrid composite with specific concern to their applications. It also provides a summary of the emerging new aspects of milling techniques for synthesizing CaCO3 from snail shells and its application for developing hybrid composites for the sustainable and greener environment.