(a) Harmful factors in the production process
1, chemical factors: including many chemical substances in the production process and production dust.
2, physical factors: including abnormal meteorological conditions, abnormal air pressure, noise, vibration, non-ionizing radiation, ionizing radiation and so on.
3, biological factors: such as Bacillus anthracis, Borrelia burgdorferi, forest encephalitis virus and other infectious agents.
(B) harmful factors in the labor process
Mainly includes unreasonable labor organization and labor system, excessive labor intensity, excessive mental or psychological tension, excessive tension in individual organs or systems during labor, long time bad body position, unreasonable labor tools and so on.
(C) harmful factors in the production environment
The main factors include the natural environment, plant construction or layout is unreasonable, from other production processes emanating from the harmful factors caused by the pollution of the production environment.