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Green synthesis has emerged as a cornerstone for advancing eco-friendly nanotechnology by utilizing plant extracts, microorganisms, and natural compounds as reducing and stabilizing agents. This sustainable approach mitigates the environmental and health hazards associated with conventional chemical and physical synthesis methods. Green-synthesized nanoparticles (NPs) exhibit remarkable potential across diverse sectors, including agriculture, pharmaceuticals, environmental remediation, and materials science. By leveraging renewable resources, this process minimizes energy consumption, toxic byproducts, and waste generation. Recent studies highlight the use of plant metabolites, fungi, and bacteria for the synthesis of metallic nanoparticles such as silver, gold, and zinc oxide, demonstrating enhanced biocompatibility and reduced toxicity. Characterization techniques such as UV-Vis spectroscopy, X-ray diffraction, and electron microscopy confirm the structural integrity and functional properties of these nanoparticles. In agriculture, green NPs act as efficient nanofertilizers, pesticide carriers, and biosensors, enhancing crop yield and reducing chemical dependency. In the medical field, they play pivotal roles in drug delivery, imaging, and antimicrobial therapies. Furthermore, green nanoparticles contribute to wastewater treatment, pollutant adsorption, and air purification, addressing critical environmental challenges. This review underscores the transformative potential of green synthesis in promoting sustainable industrial practices, fostering innovation, and aligning with the global agenda for environmental responsibility. By integrating green nanotechnology into mainstream production, industries can achieve a balance between technological advancement and ecological preservation, paving the way for a greener, healthier future.
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