Flammable gas is a type of gas that can easily ignite and burn when exposed to an open flame or spark. Common examples include propane, butane, and methane. These gases are often used for heating, cooking, and fueling vehicles, but they can pose safety risks if not handled properly. When flammable gas leaks, it can create a dangerous environment, as it may accumulate in enclosed spaces and lead to explosions or fires. Proper storage, ventilation, and detection systems are essential to minimize these risks and ensure safe usage in homes and industries.