Because of their biologic, social, and economic characteristics, young workers have unique and substantial risks for work-related injuries and illnesses. Besides retail and agriculture, other areas of high risk for work-related injuries include construction and work activities involving motor vehicles and mobile machinery. Although safety requirements and child labor laws prohibit or restrict teen employment in certain kinds of industries and occupations, young workers may yet face risks on the job because an employer or a young employee may not be aware of applicable laws and may not be aware that a hazard exists, because the young employee may lack experience, or because there is inadequate training or supervision.