Green Nanotechnology is the need of the hour. Nanotechnologies have an impact on developing green and clean technologies with considerable environmental benefits. We have seen the use of nanotechnology in areas ranging from water treatment to energy breakthroughs and hydrogen applications. In fact, renewable energy applications are the areas where nanotechnology will make its first large-scale commercial breakthroughs. This area includes the actual processes of manufacturing nanomaterials and the environmental footprint they create in absolute terms and in comparison with existing industrial manufacturing processes. As such, green nanotechnology requires a full life cycle assessment like any other industrially manufactured products. This session discusses more about green nanotechnologies.