SCBA stands for Self-Contained Breathing Apparatus, a device used to provide breathable air in environments that are hazardous or lacking oxygen. It is commonly used by firefighters, divers, and industrial workers to protect against toxic gases, smoke, or underwater conditions. The apparatus consists of a high-pressure air tank, a regulator, and a face mask. The SCBA allows users to breathe safely while performing their tasks in dangerous situations. It is essential for emergency response teams, as it enables them to enter smoke-filled buildings or hazardous areas without risking suffocation or inhalation of harmful substances. Proper training and maintenance are crucial for effective use.