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Introduction: Nanotechnology, an advanced science discipline has proved to be vital in solving the major issues or problems, the present world is facing. Nanotechnology has already proved to be the science of revolutionizing agriculture, energy conversions, applied & medical science and other domains. Conclusion: In this paper, we present the recent developments taken place in bio-nanotechnology related to different forms of nanomaterial’s developed along with their application; overcoming hazardous effects of chemical pesticides, fertilizers and herbicides by promoting green and sustainable agriculture through the use of nanofertilizers, nano pesticides and detection & control of plant diseases by using nanoparticles; development of diagnostic tools for detection and control of human diseases; targeted delivery of drugs by using nanomaterial’s, protection of the environment through nanoparticles based pollution checking, bioremediation, renewable energy production and role of nanotechnology in applied sciences.