Enriched uranium is a type of uranium that has a higher concentration of the isotope Uranium-235 compared to natural uranium. Natural uranium contains about 0.7% of Uranium-235, while enriched uranium can have 3% to 5% or more. This process of enrichment is essential for nuclear power generation and the production of nuclear weapons. The enrichment process typically involves techniques like gas diffusion or centrifugation. Enriched uranium is used in nuclear reactors to produce energy and in nuclear weapons for military purposes. Its handling and use are strictly regulated due to safety and security concerns.