Oxidation is a chemical process where a substance loses electrons, often resulting in an increase in its oxidation state. This process commonly occurs when a material reacts with oxygen, such as when iron rusts or when wood burns. Oxidation is a key part of many chemical reactions, including those that produce energy in living organisms. In addition to its role in combustion and corrosion, oxidation is also important in various industrial processes. For example, in the production of metals, oxidation can help purify ores. Understanding oxidation is essential in fields like chemistry, biology, and environmental science.