1. Physical factors
Such as high temperature, low temperature, noise, vibration, upper and lower air pressure, non-ionizing radiation (visible light, infrared light, ultraviolet light, laser, etc.). ) and ionizing radiation (X-ray, γ-ray) may cause harm to human body.
2. Chemical factors
Some industrial wastes such as waste water, waste gas and waste residue produced in the production process will do harm to human body, and some dust, smoke, fog and steam may make people allergic.
3. Biological factors
Pathogenic microorganisms and parasites in the environment, such as anthrax, mold, Brucella and fungi.
4. Other factors related to occupation
Such as unreasonable labor organization and work and rest system, intense work, heavy labor load, long-term monotonous work, night shift work, etc. Will have an impact on the human body.
5. Other factors
For example, the speed of national economic development, the level of national culture and education, the ecological environment and the level of pollution control will also have an impact on the safety and health investment and governance of enterprises.
When workers encounter occupational hazards, occupational injuries may not necessarily occur. It depends on the relationship between individuals, occupational hazards and operational conditions.