1. Types of occupational hazards: harmful factors in the production process. Such as chemical factors: including many chemicals and productive dust in the production process. Physical factors: including abnormal meteorological conditions, abnormal air pressure, noise, vibration, non-ionizing radiation, ionizing radiation, etc. Biological factors: infectious pathogens, such as Bacillus anthracis, Brucella and forest encephalitis virus.
2. The harmful factors in the labor process mainly include unreasonable labor organization and labor system, excessive labor intensity, excessive mental or psychological tension, excessive tension of individual organs or systems during labor, long-term bad posture, unreasonable labor tools, etc.
3. Harmful factors in the production environment. It mainly includes the production environmental pollution caused by natural environmental factors, unreasonable factory buildings or layout, and other harmful factors discharged in the production process.