The importance of green nanotechnologyGreen nanotechnology in sustainable development is covered in this chapter, with particular attention paid to how it may be used to create environmentally friendly products, recycle existing products, and use less energyEnergy during manufacturing processes. This chapter primarily addresses the aspects of green chemistryGreen chemistry that apply to nanoproducts over the course of their whole life cycle, from manufacturing to disposal. The present chapter also looked at how nano-remediationRemediation technology can be used to address sustainabilitySustainability issues such the toxicityToxicity, disposal, and environmental impactEnvironmental impact of nanomaterialsNanomaterial. Green nanotechnologyGreen nanotechnology, which is based on the ideas of green chemistryGreen chemistry, provides sustainable solutions by minimizing environmental effects and creating eco-friendly, reasonably priced, and useful materials. Green nanotechnologyGreen nanotechnology finds applicationApplications in the fields of nano remediationRemediation, nanomedicine, and nano sensorsSensor. Considering the tremendous efficacyEfficacy and low cost of nano-remediationRemediation technology, further research is necessary to discover and minimize any potential negative impacts on the environmentEnvironment or ecosystems worldwide. In addition to opening up economic opportunities, it has the ability to address a number of environmental issues, including pollution of the air and water. In addition, it tackles worldwide issues such as pollution, water scarcity, and climate change, supporting the objectives of sustainable development Goals.