Occupational health promotes the physical, mental, and social well-being of workers. It aims to prevent adverse health effects caused by working conditions through collaboration between employees, health and safety specialists, and other experts. Workplace health and safety is important because most workers spend many hours each day at their jobs, so work environments should be safe and healthy. Common workplace hazards include dusts, gases, noise, vibration, extreme temperatures, stress, and inadequate conditions. Effective health and safety programs control hazards at their source when possible, keep records of exposures, inform workers and employers of risks, and have active safety committees.