 Green synthesis is a sustainable method for producing various nanomaterials including metals, metal oxides, hybrids, and bio-inspired materials using natural extracts as reducing agents and solvents. The process involves fundamental mechanisms and biological components such as flavonoids, alkaloids, terpenoids, amides, and aldehydes. Green synthesis reduces the destructive effects of traditional methods and improves the stability and toxicity of nanoparticles for biocompatibility. Applications of green synthesized products include environmental remediation in terms of antimicrobial activity, catalytic activity, pollutant removal, and heavy metal ion sensing. This article was authored by Jagpreet Singh, Tanashree Dutta, Kiyoon Kim, and others.