17. It has recently been acknowledged in legislation as a workplace hazard. A risk B. ergonomics C. psychological D. chemical 18. What substance can cause harm primarily to people? A. substance B. hazard C. chemical D. psychological 19. The chance or probability that a person will be harmed if exposed to a hazard is referred to as A. psychological B. risk c. ergonomics D. none of these 20. The source of potential damage or adverse health effects on something or someone under certain conditions at work is called A hazards B. psychological C. risks D. chemical​