Atmospheric hazards can range from reduced oxygen levels, noxious fumes, flammable gases, combustible dust, or potentially lethal gases that can be undetectable by even the most experienced workers. They can render a person unconscious within seconds or minutes. In this course, we want to take you through each of the possible hazards and discuss what they are, how they originate, what the impacts are, and the testing that the Occupational Safety and Health Administration (OSHA) requires to detect them. We'll also go over what to do if dangerous levels are found. This content complies with OSHA regulation 1910.146.