Flammable gases are substances 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 as fuels for heating, cooking, and powering vehicles. When handling flammable gases, safety is crucial. They should be stored in well-ventilated areas away from heat sources. Proper equipment, such as gas detectors and flame arrestors, can help prevent accidents. Understanding the properties of flammable gases is essential for safe usage in both industrial and residential settings.