Nanomaterials are commonly known as materials engineered with at least one dimension less than 100 nm in size. Due to these nanoscale dimensions, nanomaterials exhibit significantly different physicochemical properties compared to their bulk counterparts. […] This mini review critically examines “green synthesis” as a sustainable and eco-friendly approach for nanomaterial fabrication. This mini review clarifies how various biological sources utilize their natural systems for bioreduction, converting metal compounds into nanoparticles. […] This review offers a holistic view of green synthesis.