Nanotechnology in life sciencesLife sciences has emerged as a transformative tool, particularly in agriculture, medicine and environmental sciences. At the heart of this innovation are nanomaterialsNanomaterials, typically ranging between 1 and 100 nm, that exhibit unique physicochemical properties—such as high surface area, enhanced reactivity, and tunable morphology. Their synthesis, classification, and functionalization have enabled their use in a diverse array of applications from targeted drug delivery to environmental remediation. In agriculture, plant-based nanoparticles have revolutionized crop management. These nanoparticles, synthesized using phytochemicals such as flavonoids, alkaloids, polyphenols, and proteinsProteins, offer an eco-friendly alternative to conventional methods. Silver, gold, zinc oxide, and titanium dioxide nanoparticles have been successfully used to enhance nutrient delivery, improve crop resilience, and manage pestsPests with reduced toxicity. Green synthesis not only ensures biocompatibilityBiocompatibility but also supports sustainability goals. Controlled release systems, nano-fertilizers, and real-time monitoringReal-time monitoring sensors further exemplify how nanotechnology is contributing to smart, efficient farming practices. In the biomedical field, nanotechnology has enhanced geneGene and proteinProteins analysis through advanced nano-omicsOmics platforms. Nanoparticles such as gold, magnetic nanoparticles, nanowires, and quantum dotsQuantum dots have enabled rapid, sensitive, and selective proteinProteins extraction and purification. These materials facilitate early disease detectionDisease detection and therapeutic monitoring through stimuli-responsive systems and integrated biosensingBiosensing platforms. Similarly, in genomicsGenomics, MgO and ZnO nanoparticles protect DNA and RNA, while TiO2 offers thermal stability. Lipid-, polymer-, and polyester-based nanocarriersNanocarriers efficiently deliver CRISPR/Cas9CRISPR/Cas systems and nanopore-based sequencing and microfluidic biosensors have redefined nucleic acid detection. Plant-based functionalization further enhances the therapeutic potential of nanoparticles. Techniques like PEGylation and ligand attachment increase stability, targeting ability and bioavailabilityBioavailability in cancer therapy. Functionalized nanoparticles exhibit significant antibacterial, antioxidant and anticancer activities by disrupting microbial membranes, scavenging reactive oxygen species and inducing tumor cell apoptosis. These advances, combined with responsive hybrid systems and viral nanoparticles, support the development of personalized medicine and low-toxicity therapeutics. Environmental applicationsEnvironmental applications of nanotechnology are equally impactful. Green-synthesized nanoparticles demonstrate excellent capabilities in removing heavy metalsHeavy metals, dyes, and organic pollutants through photocatalysis, adsorption, and redox reactions. Their use in wastewater treatment, air purification, and soil remediationSoil remediation contributes to a cleaner, healthier ecosystem. However, challenges such as nanoparticle stability, reusability, and ecotoxicity remain areas for further research and policy intervention. Nanotechnology through plant-based synthesis, offers a scalable, sustainable, and biocompatible route to address pressing global challenges. Its applications across agriculture, medicine, and the environment signify a paradigm shift toward greener, smarter, and more precise technologiesTechnology. The integration of nanobiotechnology with genomicsGenomics and proteomicsProteomics not only enhances our understanding of biological systems but also drives innovation in diagnostics, therapeutics and sustainable practices. Continued research, regulation and responsible implementation will be essential to fully realize the potential of this evolving field.