Nanotechnology refers to the use of very tiny (nano-scale) materials in a range of novel ways. ‘Nano'' means tiny and nano-particles are tiny particles, more than 8000 times smaller than a human hair. The properties of nano-particles make them suitable for a range of environmental applications, both in terms of improving existing environmental problems or by anticipating and preventing future environmental problems. Some of the greatest potential uses or application of nanotechnology in the environment are as biosensors and in the sectors of treatment, agriculture, veterinary and medical sciences, fisheries, bioremediation and for green nanotech manufacturing and engineering. The present article has been constructed considering the tremendous potential and application of nanoscience and nanotechnology in the concerned fields.