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A slew of cutting-edge technologies are shaping the future. One of the big impacts of technologies is about miniature-sized particles. These nano-particles are slated to change the world. A nano size is one billionth of a metre. At such a small size, properties of matter change considerably. This is partly due to increase in surface-area to volume ratio. Nanotechnology finds wide applications in areas as diverse as painting and coating, electronics, defense, agriculture, environment and energy. These nano-products would be immensely powerful and efficient. While technology is powerful, there are some concerns that the adverse effects of technology too will be powerful. The issues vary from regulations to environmental impact to health hazards. These concerns are reflected in the initiatives and roadmaps made by nations. Governments have tried to address these issues by embedding responsible nanotechnology guidelines in initiatives and regulations. Besides issues, there are significant challenges pertaining to application and commercialisation of nanotechnology. Most of the advanced applications of nanotechnology are still in the developmental stage. Despite the challenges and issues, nanotechnology is making rapid progress and soon will become an all-pervasive technology. This book takes a look at issues in nanotechnology and challenges that nanotechnology faces.