Providing a safe and clean environment is a major challenge facing humanity. As a result of various human activities over thousands of years in agriculture, industry, housing, fuel burning, forest destruction and agriculture, the environment has been devastated by pollution, air pollution, water and soil. The most important of which is the spread of diseases and epidemics caused by pollution, climate change and global warming, which have caused major climatic problems that have led to storms and floods on the one hand, drought, desertification and water scarcity on the other, and may lead to problems The green environmental applications of nanotechnology have great potential for environmental sanitation (air, water, land) and treatment of pollution from agricultural, industrial, housing and other activities, and have a range of low-cost solutions to environmental clean-up problems.                                                                                           Environmental protection is one of the most important applied areas of nanotechnology because of the interdependence between human health and the environmental conditions in which it lives. Green technology aims at using less harmful technologies for human health and the environment and leads gradually to clean, Polluting the environment, thereby significantly reducing carbon dioxide emissions and saving the world from the problem of climate change and global warming. This research aims at reviewing the green environmental applications of nanotechnology in the future