Oksigen, or oxygen, is a colorless, odorless gas that is essential for life on Earth. It makes up about 21% of the Earth's atmosphere and is vital for the process of respiration in animals and humans. Plants produce oxygen through photosynthesis, converting sunlight, carbon dioxide, and water into energy and oxygen. In addition to its role in supporting life, oksigen is also important in various industrial processes. It is used in the production of steel, in medical applications for patients needing respiratory support, and in rocket propulsion systems. Oksigen is a key element in many chemical reactions, making it crucial for both biological and industrial functions.