This "Welding: Ventilation Safety" lesson covers essential practices for maintaining safe air quality when welding. It explains the risks posed by hazardous fumes and gases, which can lead to serious respiratory issues and other health concerns. The lesson provides guidance on effective ventilation techniques, including local exhaust systems and proper positioning, to help reduce exposure to harmful substances. By following these ventilation safety practices, welders can create a safer work environment and protect their health from long-term risks associated with poor air quality.