Industrial Hygiene is the science of protecting and enhancing the health and safety of people at work and in their communities by anticipating, recognizing, evaluating, preventing, and controlling environmental factors or stressors. These job health hazards can cause sickness, impaired health and well-being, or significant discomfort for workers which can lead to poor job performance and a lack of productivity. These environmental factors can include noise, air contaminants, biological contaminants, emissions, equipment and human activity.