ATEX 137 is a European directive that focuses on the protection of workers in environments where explosive atmospheres may occur. It sets out minimum safety and health requirements for workplaces, ensuring that employers assess risks and implement necessary measures to prevent explosions. The directive applies to various industries, including mining, chemical, and oil and gas, where flammable gases, vapors, or dust may be present. Employers must provide training, proper equipment, and safety procedures to safeguard employees, promoting a culture of safety in potentially hazardous environments.