In the U.S., GM has set a goal for all facilities' environmental professionals, their supervisors, and managers to become Certified Hazardous Materials Managers (CHMM). The certification requires a relevant degree and three year's appropriate experience, or 11 year's experience without a degree, and the successful completion of an Institute of Hazardous Materials Management exam. In order to maintain certification, at least 24 hours of technical environmental training are required annually. Approximately 90 percent of GM North America environmental professionals have achieved CHMM certification. GM conducts similar training programs in Canada and Mexico.