Future energy and therapeutic perspectives of green nano-technology: recent advances and challenges

World population are struggling with numerous problems related to environmental issues such as pollution, availability of food, as well as the demand and supply of energy. The pollution caused due to the inappropriate management of natural resources is raising grave concerns towards environment safety and sustainability. Certain scientific fields including chemistry and nanotechnology play a fundamental role in the sustainability of environment by promoting green technologies. Recent advances in new and less toxic or nonhazardous materials for industries have been assisting in generating and promoting sources for renewable energy, which is crucial for environmental protection. Considering the demand of energy for all industries and the developmental processes, it is very much necessary to promote the production and consumption of sustainable / green energy. For achieving a green economy, it is necessary to find new ways of producing green energy by using nanosystems and nanoparticles. This review article will focus on the evaluation of the green nanochemistry for sustainable development and will highlight recent advances in the green technology by using nanotechnology-based systems and materials.