6. includes chemical substances such as acids or poisons and those that could lead to fire or explosion, like pesticides, herbicides, cleaning agents, dusts and fumes from various processes such as welding 7. includes bacteria, viruses, mold, mildew, insects, vermin, animals 8 includes workplace stressors arising from a variety of sources. 9. the physical or environmental conditions of work which comply with the prescribed Occupational Health Safety (OHS) standards and which allow the workers to perform his or her job without or within acceptable exposure to hazards. the practices related to production and work process​