"불" is the Korean word for "fire." It is a chemical reaction that produces heat and light, often resulting from the combustion of materials like wood, coal, or gas. Fire is essential for various human activities, including cooking, heating, and generating energy. In nature, fire can occur through natural events such as lightning strikes. It plays a crucial role in ecosystems by helping to clear old vegetation, allowing new growth. However, uncontrolled fires can lead to wildfires, which can be devastating to both the environment and human settlements.